Audio Amplifier Berbasis Op-Amp

Rangkaian Audio Power Amplifier Berbasis Op-Amp

The amplifier is based on the commonly used class-AB complementary power amplifier with compound pair output transistors. The system uses a TL074 quad opamp to drive the output transistors. As can be seen from figure 1, A2 is used to set the voltage gain of the amplifier. Assuming the voltage gain of a common collector stage to be unity, the overall voltage gain of the amplifier is equal to (R4 / R3) + 1, i.e. the gain of a non-inverting OP-AMP (16 or 24dB, in this case). Since the output transistors are within the feedback loop of A2, A2 also acts to linearise the input characteristic of the complementary pair Q1/Q2 & Q3/Q4. This allows for greater mismatch between the NPN-PNP transistors.

Skema Rangkain Audio Amplifier Berbasis Op-Amp

The biasing to Q1 & Q3 is provided by R6, R7 & diodes D1 & D2. This arrangement biases the transistors just above cut-off and reduces crossover distortion. R6 must be adjusted to the highest value which eliminates crossover distortion. Ideally D1 & D2 should be mounted so they are in contact with the driver transistors - not the main heatsink.

To adjust R6 without an oscilloscope, start with R6 set to maximum, set the volume control R2 to get the minimum audible output with a suitable input source (such as a CD player which gives 0.65Vrms at line out), and listen for any "crackle" in the sound, especially that which seems to be riding on low frequency sounds. If a "crackle" is heard then reduce the value of R6 in very small steps, until the crackle (crossover distortion) becomes inaudible (it can't be eliminated, I feel).

As the output of opamp A2 is being pulled up by the biasing circuit, capacitor C5 must be connected between the output of A2 and ground to prevent the circuit from breaking into oscillations. The value of C5 is not critical, any value between 22nF to 100nF will do. The opamp A1 is a simple buffer which isolates the input circuit from the power stage. C1 & R1 are used to set the lower 3db frequency to around 15Hz, and to obtain an input impedance of about 100K. The upper 3db frequency is determined by R4 & C7, which in this case is approximately 30KHz. The schematic shows only one channel of the stereo amplifier. The amplifier can be used to drive speakers with impedance ranging from 3 Ohms to 8 Ohms, higher impedance speakers could be used but the power output will be substantially less.

The voltage gain of the amplifier can be increased by increasing R4 or decreasing R3, as long as the output swing is kept less than or equal to 3 Volts below the supply rails. This is due to the fact that the maximum output voltage of an opamp is always 2-3 Volts less than the supply rails, before it clips.

source sound.westhost.com

500 Watt Audio Amplifier On-Semi Transistor

500 Watt Audio Amplifier On-Semi Transistor

There are some important updates to this project, as shown below. Recent testing has shown that with the new ON Semi transistors it is possible to obtain a lot more power than previously. The original design was very conservative, and was initially intended to use 2SA1492 and 2SC3856 transistors (rated at 130W) - with 200W (or 230W) devices, some of the original comments and warnings have been amended to suit.

WARNINGS:

• This amplifier is not trivial, despite its small size and apparent simplicity. The total DC is over 110V (or as much as 140V DC!), and can kill you.
• The power dissipated is such that great care is needed with transistor mounting.
• The single board P68 is capable of full power duty into 4 Ohm loads, but only at the lower supply voltage.
• For operation at the higher supply voltage, you must use the dual board version.
• There is NO SHORT CIRCUIT PROTECTION. The amp is designed to be used within a subwoofer or other speaker enclosure, so this has not been included. A short on the output will destroy the amplifier.

Skema Rangkaian 500 Watt Audio Amplifier On-Semi Transistor

Please note that the specification for this amp has been upgraded, and it is now recommended for continuous high power into 4 Ohms, but You will need to go to extremes with the heatsink (fan cooling is highly recommended). It was originally intended for "light" intermittent duty, suitable for an equalised subwoofer system (for example using the ELF principle - see the Project Page for the info on this circuit). Where continuous high power is required, another 4 output transistors are recommended, wired in the same way as Q9, Q10, Q11 and Q12, and using 0.33 ohm emitter resistors.

Continuous power into 8 ohms is typically over 150W (250W for ±70V supplies), and it can be used without additional transistors at full power into an 8 ohm load all day, every day. The additional transistors are only needed if you want to do the same thing into 4 ohms at maximum supply voltage! Do not even think about using supplies over ±70V, and don't bother asking me if it is ok - it isn.


Thanks to sound.westhost.com

56 Watt audio Amplifier IC lm3876 atau 3886

This audio power amplifier project is based almost directly on the "typical application" circuit in the National Semiconductor specification sheet. As it turns out, the typical application circuit is not bad - I would go so far as to say hi-fi in the audiophile sense? Perhaps - with caveats. It has good noise and distortion figures, and is remarkably simple to build if you have the PCB.

Amplifier circuit scheme below shows the original Schematic as shown when this project was originally published. It is almost the same as in the application note, polyester bypass capacitors have been added, and the mute circuit has been disabled

Skema Rangkaian 56 Watt audio Amplifier IC lm3876 atau 3886

Voltage gain is 27dB as shown, but this can be changed by using a different value resistors for the feedback path (R3, currently 22k, between pins 3 and 9). The inductor consists of 10 turns of 0.4mm enamelled copper wire, wound around the body of the 10 Ohm resistor. The insulation must be scraped off each end and the wire is soldered to the ends of the resistor.

The 10 Ohm and 2.7 Ohm resistors must be 1 Watt types, and all others should be 1% metal film. All electrolytic capacitors should be rated at 50V if at all possible, and the 100nF (0.1uF) caps for the supplies should be as close as possible to the IC to prevent oscillation.

The supply voltage should be about + / - 35 Volts at full load, which will let this little guy provide a maximum of 56 Watts (rated minimum output at 25 degrees C). To enable maximum power, it is important to get the lowest possible case to heatsink thermal resistance. This will be Achieved by mounting with no insulating mica washer, but be warned that the heatsink will be at the-ve supply voltage and will have to be insulated from the chassis.

Layout IC lm3876/lm3886

Jengkol 2n3055-MJE2955 Amplifier 80 Watt

Jengkol 2n3055-MJE2955 Power Amplifier 80 Watt

This amplifier does not claim to be "state of the art", and in fact the base design is now over 20 years old. It is a simple amp to build, uses commonly available parts and is stable and reliable. The design featured is a slight modification of an amp I originally designed many years ago, of which hundreds were built. Most were operated as small PA or instrument amps, but many also found their way into home hi-fi systems. The amp is capable of driving 4 Ohms, but it is starting to push the limits of the transistors, however, even when used at 4 Ohms, very few failures were encountered.

This amplifier circuit no output short circuit protection, so if speaker leads are shorted while the amp is working (with signal), there is a very real risk of the transistors being destroyed. Since this amp was built commercially, the savings were worth the risk - most of these amps were installed in the speaker box, so shorting was not likely (unless the loudspeaker voice coil shorted as happened a few times). Because of the cost of the devices used (minimal), it is a cheap amp to fix even if you do manage to blow it up.

Skema Rangkaian 2n3055 Amplifier 80 Watt

If you do not have a dual output bench power supply - Before power is first applied, temporarily install 22 Ohm 5 W wirewound "safety" resistors in place of the fuses. Do not connect the load at this time! When power is applied, check that the DC voltage at the output is less than 1V, and measure each supply rail. They will be different, because of the zener diode feed resistance, but both should be no less than about 20V. If widely different from the above, check all transistors for heating - if any device is hot, turn off the power immediately, then correct the mistake.

Once all appears to be well, connect a speaker load and signal source (still with the safety resistors installed), and check that suitable noises (such as music or tone) issue forth - keep the volume low, or the amp will distort badly with the resistors still there if you try to get too much power out of it.

If the amp has passed these tests, remove the safety resistors and re-install the fuses. Disconnect the speaker load, and turn the amp back on. Verify that the DC voltage at the speaker terminal does not exceed 100mV, and perform another "heat test" on all transistors and resistors. Turn off the power, and re-connect speaker and music source.

Thanks to sound.westhost.com

14watt Audio Amplifier TDA2030

TDA2030 amplifier circuit is a monolithic IC intended for use as a low frequency class AB amplifier. TDA2030 provides 14W output power (distorsions = 0.5%) at 14V/4Ω and at ± 14V or 28V is 12W/4Ω or 8W/8Ω. TheTDA2030 provides high output current and has very low harmonic and cross-over distortion which made it one of the most used IC in audio amplifiers designs.

The performance from this circuit is very satisfactory. The sheet contains data for typical noise and distortion statistics, I cannot confirm these statistics because I don't have the equipment, but my ears tell me that the sound is good and with sensitive speakers, this amp will show some power. As can be seen, the circuit is quite simple indeed. If you can make your own PCB he circuit is very simple to make and you can design the PCB to accept the odd, staggered pin-outs of some TO220 devices.

Skema Rankaian 14watt Audio Amplifier TDA2030

PCB layout TDA2030

Resistors should be at least 1/4W types with 1% tolerance recommended. I used 0.6W 1% metal film resistors and they work well. Capacitors I used were electrolytic cans for C2, C5 and C6. At the time of building, I did not have enough 100uF caps so I used 220uF caps instead, this will not cause trouble, unless you use caps that are smaller than 100uF for C5 and C6.

C1 can be electrolytic, I used a tantalum myself (don't ask why, since they are actually more expensive). Some readers may want to use a polyester capacitor for the input (C1), this would work too but I am not sure whether any benefit will arise from the extra expense. Other capacitors (bypass caps C3 and C4. and C7) are ideally polyester caps. Mylar may be used but I prefer polyester caps and they are not expensive unless you get large values.

The values of R5 and C8 are worked out from the equations in the datasheet, but I used 1.8k ohm for R5 and 220pF for C8 and they work fine. Diodes should be 1N4001 or similar (make sure you solder them in the right way round).

A good heatsink is important and this should be a large size with good thermal conductivity. When you operate the TDA2030 from the (recommended) split rail power supply, you must insulate the device from the heatsink using a mica washer or similar. With single rail supply, this is not needed.

What is your favorite car sub?

Question 1
What is your favorite car sub?...  Alpine Type Rs... they really the best in their category.. or is there better for the money?

Answers
1)   the type rs POUND.. i prefer kicker L7s tho running two of them in my car right now - Corey

2)   MTX - Arty

3)   Digital Design - RiDiN(420)HiGh

4)   The one I'm running of course.

Lanzar Opti1232d. At $150 there are certainly better subs, but I've yet to come across anything that is better than this for the same price. - N2Audio


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Question 2
would it be better to seal the SoundStorm STS12D 12" 1200W Dual 4-Ohm Subwoofer or port it?...  and can you give me a good idea for a box design

-thanks.

Answers
1)   Depends, I personally prefer sealed because it makes the bass sound deeper than a ported box. And if you want a good box design, I prefer fiberglass boxes, they are soooo much cooler than MDF boxes. - gmaguitar01

2)   ported box the the low LOWS, sealed boxes are more for tight punchy hits... such as rock on techno - Corey

3)   depends on what you're after.



Surprisingly, the manual for the sub (available at bossaudio.com through the "support" tab) has some pretty good information. It shows frequency response graphs for their recommended sealed and ported enclosures. The sealed box begins to roll off at about 60hz, which is pretty high, but expected from a sub in this price range. However, it is shown to have usable output into the upper 30's which is going to be okay for most music. It will come up short on some hip hop.



The ported option will give you a pretty big peak in the 50hz range, which is also common for a budget sub. That represents a frequency response geared toward spl over sq. It's going to sound its loudest in the 40-60hz range and fade away pretty fast above and below that, but its low end extension is a little better than the sealed box.



The sealed enclosure will obviously be the easiest to build.

In most cases ported boxes are quite a bit larger than sealed for the same sub, but for this one it's only slightly larger. It only needs to be larger by the same volume as the port which is only about 4 hundredths of a cubic foot.



For sound quality - if you go with the ported box your front speakers will need to be pretty good because that box is going to have less output in the upper range while a sealed box will usually get well up into the range where a decent pair of front speakers will take over.



To make a long story short if you want the most output possible go ported. If you're more of a casual listener to a wide range of music you'll probably like sealed better. - N2Audio


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Question 3
What amplifier should I buy?...  I have two 10 inch kicker comp subwoofers and i would like a recommended amplifier that is cheap but still provides good bass... Any suggestions?



Check this site for RMS and Watt power.



http://www.kicker.com/comp



Thanks for the help.

Answers
1)   Pick one





1) cheap and unreliable

2) not cheap but reliable - SantaBarbarian

2)   a sony xplod 1652z can get you 200w rms x 2 @ 2 ohms, or 400w rms x 1 @ 4 ohms for like 60 bucks. a kicker zx300.1 or a kicker zx400.1 would be a great option without being to expensive. the kicker amp would have better sound quality hands down, cleaner bass. - Matt

3)   The RMS power range of 10" Kicker Comps is 50-150 watts and they have a single 4 ohm voice coil. So for a pair in parallel, you need a monoblock amp that outputs from 100 to about 400 watts RMS into 2 ohms.



A Kicker 08ZX300.1 is only $169.99 at Crutchfield and is a good match.



http://www.crutchfield.com/p_2068ZX3001/Kicker-08ZX300-1.html?tp=115



A Rockford-Fosgate Punch P300-1 is less expensive, only $139.99, but is only available at Crutchfield's "Outlet" store.



http://outlet.crutchfield.com/p_675FRP3001/Rockford-Fosgate-Punch-P300-1.html?cc=01&tp=115



Both are excellent amps. - PimpMyRide


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Question 4
Would it be safe to Push a 10" Kicker L7 with 1500 RMS daily?...  I have two kicker l7 10's, and an amp that pushes out 1650 RMS x2 channels at 2 ohms (so each Kicker would be gettin 1650 rms). Would that damage the Kicker's over time? They are said to only handle 600 Watts rms each, but i've seen people pushing almost 3000 RMS on one kicker L7 10. My amp could also push out 1000 RMS x2 channels at 4 ohms (I would just have to wire the subs differently). Would that be safer? I just want to get the most out of my subs without damaging them. Please help asap. Adam

Answers
1)   If you're pushing more than the recommended power, usually Kicker won't cover it under warranty, so you're running a risk there as well. - Corey

2)   no i would not exceed that much over the kicker rated rms for long periods of time or on a daily basis. you will melt the voice coils, at the very least you would weaken the sub and start to lose sound quality at a rapid rate. eventually sending them to the graveyard. you could get away with 1000rms 2 each but for how long i dont know. - Matt

3)   Disclaimer: I don't have intimate knowledge of this amp nor of the speaker. But I do know that a general rule is: as long as your driver is not producing audible distortion, it likely isn't suffering. Hear distortion -- back off a bit. You should be fine. - liuMeng


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Question 5
Will a 12 inch re audio xxx sound deep with a hifonics brutus 2600 watt amp?...  or will 2 12 inch cvr take it out with a 2000 watt absolute amp.?

Answers
1)   yes - Corey

2)   no - hilario p


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Best way to make my 1999 chevy prizm faster and better looking. please help?

Question 1
Best way to make my 1999 chevy prizm faster and better looking. please help?...  

Answers
1)   ujkfy - Khu

2)   Take it Chevy...and trade it for a Corvette - D J

3)   An aftermarkrt air intake system is usually good for a few horsepower. A high flow exhaust helps some. If they sell a performance chip for the ECU it can give you a considerable boost however it may not smog. - tom p

4)   sell the sh*t Chevy

and buy a honda :]

cheap, reliable, and easy to work on - cody

5)   Install a Turbo Kit, with NOS, Intercooler, etc.



Lowering suspension kit, carbon fiber hood.

Aftermarket rims, cluster, guages, exhaust.

Spoilers. - AL M

6)   why? i am sorry but you could drop $10,000 on a prizm and it would still be a $2500 car. - dragon breath

7)   ergf - mustangfanatic


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Question 2
i just don't fit in.?...  as ive gotten older ive never felt like i was a part of my age group. ive always felt more mature for my age. my dad is like the only person in this entire universe that really understands me. ive been and seen a lot for my age. my mother is not a very good mom. my grandmother lives with us and can be really harsh. ive always felt like ive worked so hard for everything i have and i feel like i keep getting crapped on. girls at my school just dont like me at all most of the time for absolutely no reason. it seems like someone is always ragging on me for no reason at all! a lot of guys like me but i cant seem to find the right one. and when i do find a guy i actually like he just ends up being a complete jerk or just out of my league. i just wish i could find some advice from an older wiser person. high school is so hard to deal with.

Answers
1)   Get a new ride. - Ree

2)   to get somewhere in life, you must face obstacles and overcome them, your still overcoming them.

It will all end soon, and youll find someone whos right for you.

youve got an entire life ahead of you.

things never stay the same all your life :)

things can only get betterrrrr - Connor

3)   Stop caring what other people think about you and look at yourself as superior to them. That should get you through high school. It works for me. - spartan

4)   there is no "league". you can be with anyone you want. and in highschool you just have to hang out with people you actually like to hang out with, dont hang out with anyone to impress anyone, thats the only way youll be happy. and youll get more respect for being yourself than trying really hard to be popular. - iuo

5)   I'm not older.. But I do know what your going through.. All I know is that I am exactly like you. I don't belong in my school at all.. I fit in a little with the jocks, the neards, the populars, and the weirds.. ALL the girls at my school HATE my guts.. Well all the "pretty" ones.. anyway.. No boys even like me either.. So when I look online and see that I'm not the only one thats like this.. I feel better. The best advice I can give you is that the "populars" Are just trying to mask something up. Trying to hide somthing bad that they have or have done.. Most likely they are the one with more problems then you.. Just try to find one friend.. One friend that likes you for you. When you find one friend that you can go to for everything that is when life starts getting better. All the people I have gone out with are dirty liars that broke up with me and broke my heart.. They can be harsh but the thing to remember is that your not the only one and that one guy is never worth it.. If it doesn't work out with one person it just means the journey to finding Mr. Right is just getting more interesting.. And when you get out of a bad relationship.. the one friend really does help you alot because you have someone to fall back on for help and strength to keep moving on. But don't move on too too fast.. Don't start dating someone else unless it has been at least 2 days or more after a brake up.. I know from experence how much it hurts.. it feels like your not respected enough by that person for them to just wait A DAY even.. - Kay

6)   get yourself a 2009 GT/Cobra/Saleen/Roush/Shelby v8 Mustang and put a axle back exhaust on it and when you start it up any guy will take a glance i guarantee it. pin stripes down the front wont hurt. - mustangfanatic


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Question 3
Two 12's Alpine Type R's?...  I have two 12s alpine type R in a bassworx sealed box.. what can i do to make it sound better? i already have a copacitor that im going to get installed that'll help me out allooottt* also, i plan on gettin w-407 alpine touch screen headunit in a month or two. i want to port my box but i dont know if thats possible. can i get it ported or might as well get a new box that is ported??? thanks~

Answers
1)   On the Box........The Cap will help ALOT. If the box still sucks port it with a 3" hole and if you still not happy trash the box and go Band Pass. A pair of 12 s move alot of air so you really need to let it breathe. A good box is everything - tom p

2)   dont try to port your sealed enclosure, you will end up ruining a good box. just buy another enclosure for your subs. believe it or not but a cap does not improve the sq of your subs. it simply gives surges to the amp when it needs it. if you have power draw problems, install a second battery for the sub.

the quality of sound is determined alot by the amp your using to push the subs. try switching to a alpine mrp-m500. one amp per sub. granted your subs are the swr-1242D model, you can wire them to 2 ohm to get 500 watts rms. otherwise, get an amp that pushes 500 watts rms at the ohm load you have your subs wired to. - Steve


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Question 4
Tips on Dynamating my trunk?...  If I just dynamat the top of my trunk Not the whole trunk, will I see any kind of change with the outside rattling in my trunk? Also is there any other produce the will reduce the license plate from rattling beside screwing it down from all four sides. I'd buy that Dynamat one but first off it looks super gay, and second, why would I want to put a red flag on my trunk that say "hey when I'm gone open me up and steal my shit!"

Answers
1)   Try to trace first which areas are rattling during heavy bass hits, then apply dynamat there.



You just put dynamat behind the liscense plate and use your own frame. Dont use the kit. - AL M

2)   about your liscense plate rattling, what i did was buy these double sided sticky poster mounts for a few bucks from wal mart and stick them on each corner on the back of my plates. no more rattling from my liscense plate.

http://cgi.ebay.com/DOUBLE-SIDED-STICKY-POSTER-MOUNT-SET-16-FOAM-TAPE-80003_W0QQitemZ380180070963QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item58847f8233 - The Evil Genius


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Question 5
Just got a car and want to install a sub in to the sound system?...  hi

i have just recently got my first car which i will be never out of come january lol

but i wanted to install 2 more speakers in the back and a sub since it only has 2 in the front but its only a 2 way radio and the radio and first 2 speakers work brill is there a way i can install more speakers or even just the sub ?? your help on this would be awesome thanks :)
the radio also has a built in cd player :P a very good one i would rather not take it out

Answers
1)   o yes! most definitly. the best way to do it is to get two amps. one for the aditional speakers and one for your subs. i dont even have any of the speakers in my truck hooked up to my radio. all amped. it sounds alot better that way. - Brandon

2)   get yourself a CD player then a sub and a 400W to a 1000W amp depending on what kind of sub or subs you get but remember with higher wattage amps you will need a capacitor to prevent power loss - tweak


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How to stop trunk rattle?

Question 1
How to stop trunk rattle?...  I'm going to be putting in a sound system in my car and will consist of two 12"sub woofers. My question is that what is the best way to not have the trunk rattle. I know its probably not able to be done but I just figured I ask.

Answers
1)   put some rubber materal in and make sure u put rubber washers under ur licence plate or ur gonig to loose that! - 1998fordexplorerFAN

2)   There a special mat(Dynomat) that is used for that problem. Search for it online. - Jason S200689

3)   go to www.dynomatt .com or u could be cheap about it and use the silver wind shield covers the foam ones and figure out a way to hold it up in your trunk - m

4)   Yes, so your question just is the best way. It's always been that way and it always very likely will stay that way, too - Ippolito

5)   dont listen to it so loud....its annoying!!! - Steven

6)   Get some sound deadening material like Dynamat. - Bodyrot


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Question 2
What do you guys think about this Kenwood Party Pack?...  I have a 2006 Altima and listen to metal. I don't care about having the loudest car, I just want more bass. What do you guys think about this Party Pack from Kenwood? http://www.bestbuy.com/site/Kenwood+-+Party+Pack+with+Two+12%22+Subwoofers+and+350W+Amplifier/9389173.p?id=1218097994085&skuId=9389173 I know it's not the best so please don't lecture me on the best equipment out there. Is it a good value for the price (going on sale soon for $70 less)? OR should I go with a Bazooka which I am also considering?

Answers
1)   thats not too bad of a setup. i would go with the kenwood over a bazooka any day.

it probably would do what you want. not too loud but better sq. - Steve

2)   From a price point its not bad. - RepNchicago

3)   $70.00? Go for it! - RiDiN(420)HiGh

4)   I say go for it. It'll a good amount of bass for you. And with the 70 bucks you'll save soon, you can buy a sub enclosure to put them in. - Chris Downs


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Question 3
Interior neons flashing to bass for my car?...  So i've really been wanting to get the neons for the interior of my car that flash to the bass of the music =] I just have a few questionz bout it.,. If you own any,. have they caused any electrical problemz to the car or the speakers? is there any cons to getting these kind instead of the regular ones?

Also,. i was thinking of just getting four or five 9 inch bars, one under each seat and then maybe puting one above the back seats right under the rear window,. would that be enough to light up most of the interior? or is it going to end up just looking like seperate little bars lighting up different small sectionz of the car =/



And last but not least., i know it's illegal to have neons in cars unless for show,. but would i get pulled over if i drive at night with the interior neons on? This is for the state of California,.. because i've heard some people say most cops let that slide by =/



thanks =]

Answers
1)   1) My friend has that done to his car. LOL No they don't cause electic problems unless not wired right. I know someone whose speakers burnt out because of wrong wiring.

2) Yes, that would light up most of the interior when the bass would be up.

3) I don't know if it's illegal, but if it is, I guess just keep the bass on medium. That way they wouldn't be too bright. BTW, cops let me slide by going 80 in a 45, so.... - Nev_619dx

2)   it wont cause electrical problems

and if you want to get away with it just tint your windows the same color as the neons and thel never notice, or even black would do - Jasun K

3)   first off, i have a 10" ring under each of my 2 seats, then 2 more rings in the back of my hatch. They light up my entire car... I never had a problem with the wiring, just make sure it's done right, and if they do not get the correct amount of power they may need a "warm up" time. Lastly, yes i'm almost positive it's illegal, BUT i've gotten away with it, it may be becasuse my windows are extremely tinted, but by any rate, i would make an easily accessable and relatively hidden on/off switch that you can flick if things get hairy. Hope this helps -w - wetherman


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Question 4
If my amp is 50x4 watts, and my two subs are at 450 rms together, am i getting full potential?...  I have 2 12' mtx thunder 4500 subs powered by a pioneer premier gm-a5040 amp that gives out i believe 50x4 watts. so if my subs are at 225 watts rms each and together at 450 watts rms. Does this mean that i am not fully using my subs at its potential because the amp's watts is only at 200 while my subs are at 450? and im also thinking of getting a used head unit, alpine cda-9827. is this head unit good for 75 bucks?

Answers
1)   You are correct, you are not using the subs to their full potential. Keep in mind as well that amplifier power is usually quoted at peak power and RMS is more realistic. Also, you are running 2 speakers with a four channel amp. Unless you can bridge the amp to two channels your speakers will only see about 25 watts each. I would recommend a 2 channel amp of about 200 watts RMS per channel (400x2 peak). You will also need a crossover to cut off the higher frequencies to the sub-woofers. Many amps come with built in subwoofer crossovers, this would be your best option. Be sure to wire the amp directly to the battery with at least 4 gage wire and a 500 mF capacitor would also be a good idea. Good Luck. - mechengineer

2)   for your first question: your amp is a 4 cahnnel amp (thats why it says 50x4) - your only getting 50 watts per cahnnel and that is 50watts rms or max i'm not sure cuz you didn't mention it. generally subs go on one cahnnel becuase it maximizes the power the amp can give to them. so try to find a 1cannel usually called monoblock amp that is roughly 500watts . BTW: four channel amps are genrally for speakers in your car because you have four of them and when you want to replace them with aftermarket one's it helps them put out at their max power. if your getting those then save the amp.



for your second question: yes thats pretty good. it gennerally costs $150-$195 for a new one. - ♦ Singh ♦

3)   for one thing that amp right there is a 4ch amp like said above, sec. its a class A amp, if ur looking to push these subs go with a class D mono amp, third how old is that thing i bet its like 12years old.... sorri to rag on ya yo - Boogieman


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Question 5
does any MX5 owners know what i need to do if my car cigar lighter,cd player and insight lights are not work?...  i though it was a simple issue of changing plugs under the stering wheel..i have done that and it doesn seem to work... its there a circut or somthing i need to chek?? its MX5 mk 1, 1992
i change the cigar fuse..u wouldn know any other tat i should check??

Answers
1)   because all 3 curcuits have gone together i'd check the fuses sounds like the one for the radio has gone - smoggs_76

2)   sounds like a fuse, sometimes a bad cig lighter can short out and blow the fuse. - wirenut

3)   its prob a fuse - jannyyoon1


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What product should I get to listen to my ipod in my car?

Question 1
What product should I get to listen to my ipod in my car?...  The car is a volkswagon and the ipod is an ipod classic. I don't have an aux hookup thing in the car, can I still have ipod hookup? HELP!!
The car also doesn't have a tape player.

Answers
1)   some speakers - Gezo

2)   You can't hook it up, but you CAN get speakers for your ipod. - Lemon Pie

3)   u can buy a tape that connects to your ipod. i own one. it works great. i recommend it. - Ted

4)   if it has a tape deck, you can get an adapter that has a tape with a wire running out that connects to the earphone jack in your ipod.



if not, you can get an fm transmitter. these are more expensive, and, while they produce higher quality audio, they break much more often and if you cant find a radio station with just static then it wont play right - Ac3

5)   You could get a portable iPod speaker such as the iHome Color Changing Stereo System with Passive Speaker. - Julia

6)   there are many things, some of which you can find overly priced at an apple store, which plug into th eheadphone output of the ipod, or any mp3 player, and transmit sound to your radio over any 1 of several frequencies. many don't work very well, but my sister got one for her ipod and it seems that the new era of electronics may have solved this. also, they make ths same kind of thing which goes into the tape deck... - ez80227

7)   the iTrip.

it lets you listen to your ipod off of the radio.



it works great - George

8)   use mrs.BELKIN or mr.GRIFFIN - surfmystyle


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Question 2
What's wrong with my car speakers (rear 6x9s)?...  So I don't know anything about the electrical stuff on my car but there's a problem with my rear two speakers on my 2001 Mazda Protege MP3.



So the one on the driver's side doesn't produce any sound at all.



And the one on the passenger's side produces normal sound sometimes, then sometimes it'll produce a crackly sound, and then sometimes it won't produce any sound at all.



What's wrong with it?

Answers
1)   Check the wiring connections. It's a good first step. - Firecracker .

2)   your speakers are most likely blown, meaning they need to be replaced.



other than that im not sure, if you have a car audio shop near-by drop in and have them listen to the sound, they should be able to tell you for sure if they need replacing. - teg

3)   Their just blown replace them simple as that - Tim

4)   they got blown out you just need them replaced is all - Muerte BloodDragon


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Question 3
Chevy S-10 Blazer stereo problems.?...  My stereo is the original one that came with the car and has no power running through it but the clock (part of the stereo) works fine. I've tried changing both the fuses that power the radio and nothing has worked. I've also taken the stereo deck out of the car and see no problems. Any ideas on why this could be happening? I have a feeling it is within the stereo deck but I don't want to give up yet! Thanks.

Answers
1)   fueses - Jason

2)   check to see if there is 2 power wires. The clock would have to be hot all the time. I would think that there is another hot wire when you turn the switch on - Joe w

3)   can you pull the deck out of the console ? if so check behind it for a blue wire labeled "remote"..... some factory radios do not have this wire but yours might.



the remote wire tells the radio when the ignition is on or off, therefore telling the radio to come on or off, if this wire becomes unplugged or damaged the radio stays off, but the clock may be wired somewhere else and thats why its staying on. - teg

4)   The stereo could have experienced a wet willy when you dropped on coke on it. - surfmystyle


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Question 4
NEED TO KNOW WHAT SIZE CAPACITOR TO GET FOR MY SYSTEM.?...  • 4 Channel

• 4 Ohms Rms: 120x4

• 2 Ohms Rms: 145x4

• Mono Rms: 290x2

• Max Power: 1400

this is my amp



* Sensitivity: 91 dB

* RMS Power Range : 150 Watts

* Peak Power Handling: 800 Watts

* Impedance: 4 Ohm

* Low Frequency response: 20 Hz

* High Frequency Response: 4500 Hz

* Diameter: 12 Inch

these are my subs i have two of them,



WHAT SIZE CAPACITOR WILL I NEED!!

&&& WILL THIS HELP MY CAR FROM CUTTING OUT THE DOOR SPEAKERS WHEN I TURN IT UP LOUD?

Answers
1)   i would upgrade the BATTERY or alternator and or both and if ur havin trouble with the Component speakers upgrade those and hook them to amps too - Matt

2)   cap's are near useless for car audio. they are a gimmick to get your money. google 'the big 3' and do that instead, it will work 10x better for less money.



honestly, at your power level you should not be having any trouble. double check your wiring. - dragon breath

3)   A cap will not prevent your speakers from cutting out at high volumes.



You will not need a cap. Most people buy caps for the wrong reasons. A cap will not help create new power and it will not be very helpful for stopping headlight dimming issues. If you have power issues than do the "big 3" upgrade like recommended previously. In most cases a cap is going to be a waste of money so I would not recommend getting one.



If your door speakers are cutting out at high volumes it will likely be from another issue.



Good Luck!!! - MDC


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Question 5
how can you bridge a mono block amp?...  and about ohms is it better to be higher ohms or lower ohms

Answers
1)   a mono amp is already 1 channel. their is no bridging

the lower the resistance ( ohm's ) the higher the wattage, as long as the amplifier is rated for it. - dragon breath

2)   No, you can't bridge a monoblock amp.



It is better to have an 8 ohm load on an amp than a 1 or 2 ohm assuming equal power output. Having an 8 ohm load would have lower heat and distortion than a 1 or 2 ohm load. However, an 8 ohm load will not produce the same amount of power as at a 1 or 2 ohm load. With a 1 or 2 ohm load your amp will produce more power than at 8 ohms. So there is an advantage or disadvantage to either setup.



Good Luck!!! - MDC


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Driver + Amplifier Sub Woofer

This Driver + Amplifier Sub Woofer circuit can be connected to an existing car stereo amplifier, adding the often required extra "punch" to the music by driving a subwoofer. As low frequencies are omnidirectional, a single amplifier is necessary to drive this dedicated loudspeaker.

Skema Rangkain Driver + Amplifier Sub Woofer

List Componet

P1_____________10K  Log Potentiometer
P2_____________22K  Dual gang Linear Potentiometer

R1,R4___________1K  1/4W Resistors
R2,R3,R5,R6____10K  1/4W Resistors
R7,R8_________100K  1/4W Resistors
R9,R10,R13_____47K  1/4W Resistors
R11,R12________15K  1/4W Resistors
R14,R15,R17____47K  1/4W Resistors
R16_____________6K8 1/4W Resistor
R18_____________1K5 1/4W Resistor

C1,C2,C3,C6_____4µ7  25V Electrolytic Capacitors
C4,C5__________68nF  63V Polyester Capacitors
C7_____________33nF  63V Polyester Capacitor
C8,C9_________220µF  25V Electrolytic Capacitors
C10___________470nF  63V Polyester Capacitor
C11___________100nF  63V Polyester Capacitor
C12__________2200µF  25V Electrolytic Capacitor

D1______________LED  any color and type

Q1,Q2_________BC547  45V 100mA NPN Transistors

IC1___________TL072   Dual BIFET Op-Amp
IC2_________TDA1516BQ 24W BTL Car Radio Power Amplifier IC
SW1____________DPDT toggle or slide Switch
SW2____________SPST toggle or slide Switch capable of withstanding a current of at least 3A


The power amplifier used is a good and cheap BTL (Bridge Tied Load) 13 in IC made by Philips (now NXP Semiconductors) requiring a very low
parts count and capable of delivering about 22W into a 4 Ohm load at the standard car battery voltage of 14.4V.

Notes:

• IC2 must be mounted on a suitable finned heatsink
• Due to the long time constant set by R17 and C9 in the dc voltage stabilizer, the whole amplifier will become fully operative about 15 - 30 sec. after switch-on.

6 Volt Headphone Amplifier

Some lovers of High Fidelity headphone listening prefer the use of battery powered headphone amplifiers, not only for portable units but also for home "table" applications. This design is intended to fulfil their needs and its topology is derived from the Portable Headphone Amplifier featuring an NPN/PNP compound pair emitter follower output stage. An improved output driving capability is gained by making this a push-pull Class-B arrangement. Output power can reach 100mW RMS into a 16 Ohm load at 6V supply with low standing and mean current consumption, allowing long battery duration.

The single voltage gain stage allows the easy implementation of a shunt-feedback circuitry giving excellent frequency stability.

Skema Rangkaian 6 Volt Headphone Amplifier

List Component of Headphone Amplifier:

P1_____________22K  Dual gang Log Potentiometer (ready for Stereo)

R1_____________15K  1/4W Resistor
R2____________100K  1/4W Resistor
R3____________100K  1/2W Trimmer Cermet
R4_____________47K  1/4W Resistor
R5____________470R  1/4W Resistor
R6____________500R  1/2W Trimmer Cermet
R7______________1K  1/4W Resistor
R8,R9__________18K  1/4W Resistors
R10,R11_________2R2 1/4W Resistors
R12____________33R  1/4W Resistor
R13_____________4K7 1/4W Resistor

C1,C2__________10µF  25V Electrolytic Capacitors
C3,C5_________100nF  63V Polyester Capacitors
C4,C6_________220µF  25V Electrolytic Capacitors

Q1,Q2,Q5______BC560C  45V 100mA Low noise High gain PNP Transistors
Q3,Q4_________BC550C  45V 100mA Low noise High gain NPN Transistor
Q6____________BC327   45V 800mA PNP Transistor
Q7____________BC337   45V 800mA NPN Transistor

J1_____________RCA audio input socket
J2_____________6mm. or 3mm. Stereo Jack socket
B1_____________6V Battery 

Notes:

• Before setting quiescent current rotate the volume control P1 to the minimum, Trimmer R6 to maximum resistance and Trimmer R3 to about the middle of its travel.
• Connect a suitable headphone set or, better, a 33 Ohm 1/2W resistor to the amplifier output.
• Switch on the supply and measure the battery voltage with a Multimeter set to about 10Vdc fsd.
• Connect the Multimeter across the positive end of C4 and the negative ground.
• Rotate R3 in order to read on the Multimeter display exactly half of the battery voltage previously measured.
• Switch off the supply, disconnect the Multimeter and reconnect it, set to measure about 10mA fsd, in series to the positive supply of the amplifier.
• Switch on the supply and rotate R6 slowly until a reading of about 3mA is displayed.
• Check again the voltage at the positive end of C4 and readjust R3 if necessary.
• Wait about 15 minutes, watch if the current is varying and readjust if necessary.
• Those lucky enough to reach an oscilloscope and a 1KHz sine wave generator, can drive the amplifier to the maximum output power and adjust R3 in order to obtain a symmetrical clipping of the sine wave displayed.

Phono Amplifier

In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for cheap moving-magnet cartridges, can be used in connection with the audio power amplifiers shown in these webpages, featuring low noise, good RIAA frequency response curve, low distortion and good high frequency transients behavior due to passive equalization in the 1 to 20KHz range. Transistors and associated components provide ±18V supply to the op-amp, improving headroom and maximum output voltage.

Skema Rangkain Phono Amplifier

Component List Of Phono Amplifier

R1_________47K   1/4W Resistor
R2________100R   1/4W Resistor
R3__________6K8  1/4W Resistor
R4_________68K   1/4W Resistor
R5,R6_______2K7  1/4W Resistor
R7__________2K2  1/4W Resistor
R8_________39K   1/4W Resistor
C1-C3_____100µF  25V Electrolytic Capacitors
C4,C5______47nF  63V Polyester Capacitors 5% tolerance
D1,D2__BZX79C18  18V 500mW Zener Diodes
IC1_______LM833  Low noise Dual Op-amp
Q1________BC337  45V 800mA NPN Transistor
Q2________BC327  45V 800mA PNP Transistor

Notes:

• R2, R3, R4, R7, R8, C4 & C5 should be low tolerance types.
• Schematic shows left channel and power supply.
• For stereo operation R1, R2, R3, R4, R7, R8; J1; C1, C4 & C5 must be doubled.
• Numbers in parentheses show IC1 right channel pin connections.

6.9 Watt Audio Amplifier Kelas A

This circuit of audio amplifier push-pull single-ended Class A is capable of providing a sound comparable to those valve amplifiers, delivering more output power (6.9W measured across a 8 Ohm loudspeaker cabinet load), less THD, higher input sensitivity and better linearity.

Voltage and current required for this circuit are 24V and 700mA respectively. The only penalty for the transistor operated circuit is the necessity of using a rather large heatsink for Q2 and Q3. In any case, the amount of heat generated by this circuit can be comparable to that of a one-valve amplifier. An optional bass-boost facility can be added, by means of R5 and C5.

Skema Rangkaian Audio Amplifier Kelas A

Component list of audio amplifier kelas A

P1_____________47K  Log. Potentiometer (Dual-gang for stereo)

R1____________100K  1/4W Resistor
R2_____________12K  1/4W Resistor (See Notes)
R3_____________47K  1/4W Resistor
R4______________8K2 1/4W Resistor
R5______________1K5 1/4W Resistor (Optional, see Notes)
R6______________2K7 1/4W Resistor
R7,R9_________100R  1/4W Resistors
R8____________560R  1/2W Resistor (See Notes)
R10_____________1R  1/2W Resistor

C1,C2__________10µF  63V Electrolytic Capacitors
C3_____________47µF  25V Electrolytic Capacitor
C4____________100µF  35V Electrolytic Capacitor
C5____________150nF  63V Polyester Capacitor (Optional, see Notes)
C6,C7_________220µF  25V Electrolytic Capacitors
C8___________1000µF  25V Electrolytic Capacitor

Q1___________BC560C  45V 100mA Low noise High gain PNP Transistor
Q2,Q3________BD439   60V 4A NPN Transistors

Notes:

• If necessary, R2 can be adjusted to obtain 13V across C8 positive lead and negative ground.
• Total current drawing of the circuit, best measured by inserting the probes of an Avo-meter across the positive output of the power supply and the positive rail input of the amplifier, must be 700mA. Adjust R8 to obtain this value if necessary.
• Q2 and Q3 must be mounted on a finned heatsink of 120x50x25mm. minimum dimensions.
• Add R5 and C5 if the bass-boost facility is required.

Mosfet Audio Amplifier 60watt - 90watt

This circuit was designed to produce high quality and powerful audio power amplifier that would provide 60W-90W power output.

Skema Rangkaian Mosfet Audio Amplifier

Daftar Component Audio Amplifier Mosfet

The transistors Q6 & Q7 should be fitted on a small and U-shaped heatsink while a larger heatsink is used to mount the transistors Q8 & Q9. For the regulation of voltage, the trimmer R10 is set to its minimum resistance which is made possible when powering ON the amplifier and then adjusting R10 until the drawing of the current reaches about 120 mA to 130 mA. If necessary, the current will need to be readjusted when after 15minutes, the current keeps on varying.

The circuit power supplay suggested value for capacitors C1 & C2 should be at the required minimum for a mono amplifier. The capacitance values may be increased up to 10000 uF when used in stereo configurations to achieved optimum performance. To eliminate ground loops and hums, an appropriate grounding is very essential. This will be done by connecting R1, R3, C2, C3, & C4 to the same point of the ground sides and the ground input wire while in the output ground, C7-C11 & R7 will be connected. Finally, the input and output grounds will be connected separately to the power supply ground.

TDA 2005 CAR Audio Power Amplifier 12 Volt

This is circuit of Audio Power Amplifier use IC TDA2005, the circuit suitable for Car amplifier cos used supply 12Volt. The IC TDA2005 is class B dual audio power amplifier package specifically designedfor car radio application : power booster amplifiers are easily designed using this device that provides a high current capability (up to 3.5 A) and that can drive very low impedance loads

Skema Rangkaian CAR Audio Power Amplifier 12 Volt

used a well designed quality transformer to get less noise. It will be another good way to use a sufficient battery to power the circuit. Keep the supply wires as short as possible. Input source should be isolated from the external noises too. It is recommended to use coaxial cable to connect the input audio.

Absolute Maximum Rating IC TDA2005

Operating Supply Voltage......................... 18 V
DC Supply Voltage................................ 28 V
Peak Supply Voltage (for 50 ms).................. 40 V
Output Peak Current (non repetitive t = 0.1 ms).. 4.5 A
Output Peak Current (repetitive f . 10 Hz)....... 3.5 A
Power Dissipation at Tcase = 60 °C............... 30 W
Storage and Junction Temperature................. – 40 to 150 °C.

Updated November 15, 2009, 7:05 pm

Audio Ampifier Khusus Untuk Gitar

This is a circuit of an audio amplifier for the guitar. This circuit can reproduce a Combo amplifier of the type very common in the 'Sixties and the' Seventies of the past century. It is well suited as a guitar amplifier but it will do a good job with any kind of electronic musical instrument or microphone.

5W power output was a common feature of these widespread devices due to the general adoption of a class A single-tube output stage (see the Vox AC-4 model). Furthermore, nowadays we can do without the old-fashioned streetcars VIB-feature frequently included in those designs.

Skema Rangkaian Audio Ampifier Khusus Untuk Gitar

List Component Of Gitar Ampifier

P1______________4K7 Linear Potentiometer
P2_____________10K Log. Potentiometer

R1,R2__________68K 1/4W Resistors
R3____________220K 1/4W Resistor
R4,R6,R11_______4K7 1/4W Resistors
R5_____________27K 1/4W Resistor
R7______________1K 1/4W Resistor
R8______________3K3 1/2W Resistor
R9______________2K 1/2W Trimmer Cermet
R10___________470R 1/4W Resistor
R12_____________1K5 1/4W Resistor
R13___________470K 1/4W Resistor
R14____________33K 1/4W Resistor

C1____________100pF 63V Ceramic Capacitor
C2____________100nF 63V Polyester Capacitor
C3____________470µF 35V Electrolytic Capacitor
C4____________220nF 63V Polyester Capacitor (Optional, see Notes)
C5_____________47µF 25V Electrolytic Capacitor (Optional, see Notes)
C6______________1µF 63V Polyester Capacitor
C7,C8,C9,C10___47µF 25V Electrolytic Capacitors
C11____________47pF 63V Ceramic Capacitor
C12__________1000µF 35V Electrolytic Capacitor
C13__________2200µF 35V Electrolytic Capacitor

D1_____________5mm. Red LED
D2,D3________1N4004 400V 1A Diodes

Q1,Q2________2N3819 General-purpose N-Channel FETs
Q3____________BC182 50V 200mA NPN Transistor
Q4____________BD135 45V 1.5A NPN Transistor (See Notes)
Q5____________BDX53A 60V 8A NPN Darlington Transistor
Q6____________BDX54A 60V 8A PNP Darlington Transistor

J1,J2________6.3mm. Mono Jack sockets

SW1____________1 pole 3 ways rotary switch (Optional, see Notes)
SW2____________SPST Mains switch

F1_____________1.6A Fuse with socket

T1_____________220V Primary, 48V Center-tapped Secondary
20 to 30VA Mains transformer

PL1____________Male Mains plug

SPKR___________One or more speakers wired in series or in parallel
Total resulting impedance: 8 or 4 Ohm
Minimum power handling: 20W

The present circuit can deliver 10W of output power when driving an 8 Ohm load, or about 18W @ 4 Ohm.It also features a two-FET Preamplifier, two inputs with different sensitivity, a treble-cut control and an optional switch allowing powerful overdrive or treble-enhancement.

4.5Volt Transistor Audio Amplifier

This is a 4-transistor amplifier suitable for a variety of projects including receivers, intercoms, microphones, telephone pick-up coils, and general audio monitoring. The amplifier has a power isolation circuit and bandwidth limiting to reduce oscillations and "motorboating". The values are not particularly critical and modest deviations from the indicated values will not significantly degrade the performance.

Skema Rangkaian 4.5Volt Transistor Amplifier

Three cell battery packs giving about 4.5 volts are recommended for most transformerless audio amplifiers driving small 8 ohm speakers. The battery life will be considerably longer than a 9 volt rectangular battery and the cell resistance will remain lower over the life of the battery resulting in less distortion and stability problems.

The amplifier may be modified to work with a 9 volt battery if desired by moving the output transistors' bias point. Lowering the 33k resistor connected from the second transistor's base to ground to about 10k will move the voltage on the output electrolytic capacitor to about 1/2 the supply voltage. This bias change gives more signal swing before clipping occurs and this change is not necessary if the volume is adequate.

30Watt Amplifier stereo with STK465

This 30Watt Amplifier stereo has two channels of amplifier in a nutshell. It is a formal designing that develops positively all the particularities completing. Concretely, we observe that the not inverting entry completed (pins 2 and 15, for each channel), is supplied from divider of tendency, which ensures tendency from the tendency of expense completing. At the same time with the entry in each channel, exists a capacitor 470rF, which achieves the unharnessing, in that it concerns the AC components of high frequency, while en line a capacitor 1mF allows in the amplifier to be supplied from desirable flourish acoustic frequencies, fence simultaneous the continuous component.

Bronchi unharnessing it is realised with the help of networking of two resistances 33KW and 330W and a capacitor 100mF, which finally ensures factor of aid equal with 100. Finally, at the same time with the exit exists networking RC (0,1mF - 4,7 Ohm) that it attends to the minimisation of phenomenon crossover. The amplifier can be supplied from a line of double polarity. Still it can function under a wide region of tendencies (±10V as ±28V). The requirements of current depend from the force of expense and it can they begin from 120mA up to 1A. It is very important the catering to be sufficiently unharnessing, so that is avoided imports of annoying noises.

Skema Rangakaian Amplifier stereo STK465

For the realisation of manufacture you are consulted the forms 2 and 3 that portray the PCB and placement of materials in this. Does not exist a dangerous element in the manufacture that it should him you are careful particularly, so much at the soldering, what at the use. Be careful the electrolytic capacitors, the placement cooler completed and naturally the polarity of lines of catering. One still directive in what it concerns the catering: good it is it is used power supply with big capacitors standardisation or still better stabilised.

Gambar PCB Amplifier stereo STK465

25 Watt Audio Amplifier using TDA2009

This is a circuit of 25 Watt audio power amplifier used IC TDA 2009. The TDA 2009 has two channels each rating 12.5 watts on 4 Ohm load. Here the two channels are bridged to get a single out put channel weighting 25 W.

The TDA 2009 IC has also built in features such as short circuit protection,thermal protection, overload protection etc using very low external components.The most interesting factor I see about this IC is that it require no dual supply.

Skema Rangkaian 25 Watt Audio Amplifier

Notes:
Fit a proper size heat sink to TDA 2009
All capacitors in this circuit must be rated above 25 V.



The TDA2009Ais class AB dual Hi-Fi Audio power amplifier assembled in Multiwatt [ package, specially designed for high quality stereo application as Hi-Fi and music centers.




Supply Voltage...................................... 28 V
Io Output Peak Current (repetitive f . 20 Hz)....... 3.5 A
Io Output Peak Current (non repetitive, t = 100 ms). 4.5 A
Ptot Power Dissipation at Tcase = 90 °C............. 20 W
Tstg, Tj Storage and Junction Temperature........... – 40, + 150.

10Watt Amplifier Manggunakan IC TDA2003.

This is a circuit of a 10W amplifier using IC TDA2003 . The IC can easily deliver 10W to a 4 Ohms load at 18V DC supply voltage. The IC can be also operated from 12V and that makes it applicable in car audio systems. The useful features of TDA2003 includes short circuit protection between all pins, thermal overload protection, low harmonic distortion, low cross over distortion etc.

Skema Rangkaian Amplifier IC TDA2003

LayOut PCB Amplifier IC TDA2003

Notes

• Use 18V DC for powering this circuit.
• TDA2003 must be fitted with a heat sink.

This circuit designed as per the datasheet from the manufacturer and found to be working fine. Capacitor C7 performs the job of input DC decoupling.R2 and R3 is used to set the gain of the amplifier.C3 and R1 determines the upper cut off frequency.C6 and R4 and meant for increasing stability at high frequencies. Capacitor C5 couples the output to the speaker.

Pin TDA 2003

Absolute Maximum Rating IC TDA 2003

Peak supply voltage (50ms)............ 40 V
DC supply voltage..................... 28 V
Operating supply voltage.............. 18 V
Output peak current (repetitive)...... 3.5 A
Output peak current (non repetitive).. 4.5 A
Power dissipation at Tcase = 90°C..... 20 W
Tj Storage and junction temeperature...-40 to 150 °C.

18watt audio amplifier TIP41/TIP42

18Watt Power Amplifier circuit is quite simple and does not require a lot of components to make it. 18 Watt Power Amplifier can be directly connected to the CD player, MP3 player or other audio devices without having to use a pre-amp tone control type. Because the OCL type amplifier, the frequency response produced by 18-watt amplifier is very good. Circuit Power Amplifier 18Watt you can see in the picture below.

Skema Rangkaian 18watt audio amplifier TIP41/TIP42

List Component

P1______________22K Log. Potentiometer (Dual-gang for stereo)
R1______________1K 1/4W Resistor
R2______________4K7 1/4W Resistor
R3______________100R 1/4W Resistor
R4______________4K7 1/4W Resistor
R5______________82K 1/4W Resistor
R6______________10R 1/2W Resistor
R7______________R22 4W Resistor (wirewound)
R8______________1K 1/2W Trimmer Cermet (optional)
C1______________470nF 63V Polyester Capacitor
C2,C5____________100µF 3V Tantalum bead Capacitors
C3,C4____________470µF 25V Electrolytic Capacitors
C6______________100nF 63V Polyester Capacitor
D1______________1N4148 75V 150mA Diode
IC1_____________TLE2141C Low noise, high voltage, high slew-rate Op-amp
Q1_____________BC182 50V 100mA NPN Transistor
Q2_____________BC212 50V 100mA PNP Transistor
Q3_____________TIP42A 60V 6A PNP Transistor
Q4_____________TIP41A 60V 6A NPN Transistor
J1______________RCA audio input socket


Note:

• Q3 and Q4 should be cooler or heatsink.
• Good Grounding very influential, if not better then the grounding of the power amplifier hum will be heard. Ground A1, P1, C2, C3 & C4 are connected to a ground point, while the ground is connected at point C6 output ground.

how old do you have to be to work in a factory?

Question 1
how old do you have to be to work in a factory?...  i live in va.

Answers
1)   Most factories require you to be 18 years old. - REV B

2)   18 - insurance reasons - alex

3)   it depends on what the factory makes. if it is hazardous you have to be 21. otherwise its 18. - dragon breath

4)   it really depends on what type of factory. most you have to be 18, and if there is blades spinning and hooks flying you probley have to be 21. but there are factory's that you only have to be 16 to work at, example i worked at a blue berrie factory when i was 16, but i live in shitty ol maine. - joSeph


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Question 2
Halogen or HID head lights?...  I have poor illumination from my current headlights and i'm looking for some blue head lights to match my led side view mirrors. So heres my questions plz try to answer all of them Thx a lot:

Are blue head lights legal in NY?

Are blue Halogen brighter than standard bulbs?

Do they make HIDs in that color?

Answers
1)   It is legal as long as the bulbs are marked, "DOT approved." Halogen are brighter than non-Halogen standard bulbs. - REV B

2)   I would try a good set of halogen bulbs. If your bulbs are more than a year old then they make quite a bit less light than new bulbs.

Also, the bluer the colour of light a bulb produces at the same power output, the less actual light you will get.

Further, do not bother with HID kits. They do not control the light that well and do not provide you a huge advantage in terms of lighting, as well, because they do not control light that well, they tend to cause a lot of glare for oncoming drivers. - Hans E


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Question 3
do Speakers need baffles in the boxes?...  i got two 10 in Speakers and i need to build a truck box for them do the boxes need baffles in the boxes

Answers
1)   http://www.electronixwarehouse.com/education/amplifiers/power-ratings.htm - tronary

2)   As long as you run them in mono you don't and they have the same amount power going to them. If its a sealed box I do myself, even if it's in mono, just in case one of the subs blows. If its going to be ported I don't but you still have that problem with "if one of the subs blow" - scott p


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Question 4
Why is my car cd player not working?...  My car cd player only works when it wants to and it very seldom does. I just burnt 7 cd's to listen to and only 1 randomly works, all the other ones make the stereo say check cd and spits it out. I was wondering if theres anything at all i can do to fix this. I dont know a lot about car stereos.

Answers
1)   This maybe stupid to even post but when i use to burn cd's sometimes my cd burner software (windows media player) would randomly burn the songs to MP3 format and not the format that the car radio can read? I would check what format you have on the cds and check if your radio can play that format?



Just a helpful suggestion... - Drew & Kell


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Question 5
Whats the best amp to get for my Kicker L7 15" SOLO BARIC?...  I already have a HIFONICS1610 ...but I feel like thats not giving enough power to my sub ...whats one of the best amps to get so my sub will sound full potential?

Answers
1)   what ohm voice coil is the L7 and how do you have it wired? if you have the dual 2 ohm voice coils wired to 1 ohm you are already overpowering your sub by about 500 watts. if you have a dual 4 ohm sub wired to 2 ohm you are giving the sub all it is rated for. - dragon breath


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Updated November 9, 2009, 7:09 pm

Some good bass subwoofers?

Question 1
Some good bass subwoofers?...  Well i want some Bass sub's im going to upgrade from a bookshelf to subs, i was looking at kenwoods 2 12's in a box for 200 at best buy

And i want to connect it to a reciever to play in my room Wich i know is possible all my buds have theres set up like that But i heard woods arnt really good bass speakers so im asking what are some good bass speakers???

Answers
1)   dont buy kenwood subs for 50 extra dollars you get your self some kicker cvr 12's they are pretty good subs and they pound. - alex

2)   I have two 12" kicker CVR's. I got them in a ported kicker box online for $200. Many say they lack SQ but i think they sound amazing AND can beat like crazy. Id go with those - Jake M

3)   go with KICKERS - "BOOGIE-714"

4)   Getting good bass in home audio is a lot harder than in a car because of the size of the listening space, and with that much power it will be even harder.

If your friend's set ups are truely "good" it's going to take some time and effort to come up with something comparable, and a kenwood car sub wouldn't be a good place to start IMO.

I would look into some of the home audio subs from Dayton at partsexpress -- http://www.parts-express.com/wizards/searchResults.cfm?searchFilter=&srchExt=CAT&perPage=27&sortBy=3&layout=grid&page=1&srchPrice=&srchCat=487&srchMfg=&srchPromo=&srchAttr=



They can go very low and loud in the right enclosure. - N2Audio


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Question 2
Which 6x9 car speakers are better?...  Hi there, i have a question abut car speakers. I need new 6x9s for my 1999 Pontiac Grand Am SE. I have found 2 pairs in my price range but idk which ones to get. Heres the Specs;



Boss 6" X 9" 3-Way Chaos Speakers - 400W - $26.99

Power handling peak, 400-watt

1" aluminum voice coil

1" mylar dome tweeter

60 oz. magnet structure

Red metallic poly coated paper cone

Butyl rubber surround

Includes CHAOS design grill

Sensitivity: 92dB

50Hz~20kHz



Pyle 6" X 9" Blue Label 4-Way Speakers - $29.99

200W RMS/400W peak power output

1 1/2" film dome midrange;

1" film tweeter;

3/4" piezo tweeter

1 1/4" high temperature ASV voice coil

Frequency response: 50Hz-20kHz

50 oz. magnet structure

Mounting depth: 3 5/8"

Includes grills, mounting hardware and speaker wire

Sensitivity: 92dB



Which ones will have better bass and sound quality?

Thanks

Answers
1)   the boss by far. - Scott W

2)   The Boss is the better of those two. However, don't expect a lot better than stock until you get into the >$100 range. The material from which the speakers are made has a lot to do with it. I recommend save your money until you have around $150 or so, and get a set of Infinity Reference 6x9's. - Matt the MoparMan

3)   Boss is better but Pioneer is better then both of them. - country joe


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Question 3
How to Set Digital Clock?...  My mom has a '98 Saturn Coupe and she doesn't know how to set the clock on it. :P Help?(:

Answers
1)   Look in the owners manual of the car. There is also a button on the dash that say H and M (H for hours and M for minutes). Push the H to change the hours and M for the minutes. - bbt91945

2)   As the other person said and look below the volume or tuning as the are very small buttons and can be over looked. - Scott W


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Question 4
Do i need an amp for my subwoofer?...  i dont have an amp for my 12 inch fusion subwoofers.. do i need one? how much would it be with installation total?

Answers
1)   if u want a lil bass yes u will need an amplifier - "BOOGIE-714"

2)   Most likely unless you have some unheard of monstrous head unit you will need an amp to get out of the sub what you probably bought it for. Now what size of amp depends on the rms wattage of your subs and whether they are Dvc or Svc and @ what ohm you plan to run them. Price varies greatly for amps. Installation kits around 100$. Most audio stores offer free installation with purchase of equip - shane


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Question 5
what size amp do i need for two 12'' inch 1000 watt subs..?...  there pionneer TSW306DVC...

HELP ME PLZ! AND THANKS ALOT!!

Answers
1)   1.if the subs are 1000 watt max then each sub is 500 watts rms meaning thats the amount of contunious power they can handle so in this case you would need an amp thats between 1000-1200 watts preferably a one or two channel amp.



2.if the subs are 1000 watts rms then you would need an amp thats between 2000-2300 watts and make sure that your subs are hooked up at the right ohm load, an ohm load of 2 ohms is the best you get full power from your amp(s) and sub(s). - alex

2)   They're dvc 4's with an RMS rating of 400w. FWIW - RMS and peak have no relation at all. RMS ratings actually mean something, peak numbers do not.



You're looking for an amp around 800w rms at 1 ohm or 4 ohms.

For the 1 ohm option you could go with something like the Hifonics bxi1210d. For 4 ohms you'd need a big 2 ch which would be bridged. - N2Audio


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Kicker vs. Diamond vs. Hifonics Subwoofers?

Question 1
Kicker vs. Diamond vs. Hifonics Subwoofers?...  any suggestions to which subs are more efficent harder hitting subs pleaze?? I want to order online but dont know what brand to run with...oh and i am running a Hifonics Brutus 2006D rated 2000w

Answers
1)   Kicker. - Erik

2)   try audiobahn. from experience,i know they hit hard. i had two 12's with about 1500 watts to each one. - ant

3)   of those 3 i would take the diamonds. have a look at fi car audio and audioque for big bass on a budget.

http://www.audioque.com/aq/index.htm



https://ssl.perfora.net/www.ficaraudio.com/sess/utn;jsessionid=154ae4f2bfcfe9a/shopdata/0050_Speakers/product_overview.shopscript - dragon breath

4)   not the kicker. square subs sound crappy at high volume - Samuel W.

5)   What is your pricerange?

You have named all cheap brands...

Kicker is by far the best of the 3 you named but is is horid brand overall

Please get back to me with your pricerange... i can do better for the price.

-Patrick

Site Admin

http://www.carstereoforum.net/

Got Questions? We can help! - Patrick


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Question 2
The best GPS navigator?...  I'm looking for an gps that'll be worth my money...Not the kind that has to be charged everyday or doesn't have map updates but most of all i reeaally want one that talks to you giving you directions without me having to keep looking at the screen (i like to keep my eyes on the road).So any suggestions? The price really don't matter much to me as long as it's not crazy expensive =) thanks
P.S

i made a mistake and

placed this question in

"car audio" my bad folks lol

hope u guys can still help :)

Answers
1)   TomTom



ALL gps's have to be updated from time to time as streets do change. I use my tomtom all the time and it talks even paided 120.00 brandsmart - " ? "

2)   I have had good luck with Garmin, not too expensive, and lifetime updates for less than $150.00. The Nuvi itself was around $250.00. - Cecil n

3)   garmin. the airplanes i rent usually have garmin gps system so i figure if their good enough for planes their good enough for cars. - dr. wii

4)   Garmin



they have a wide variety from cheaper ones that are still good all the way up to $500 GPSs, which ever one you buy rather its cheap or expensive your getting more for what you pay for, the cheaper ones can run about $125 i think, i've never heard a bad thing about Garmin, i've seen reviews when i was looking for a GPS and none were bad about Garmin



i used to have a Garmin 255W and it was great, only got rid of it because i just never used it - ChevyPride0310


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Question 3
I am getting a pioneer 12 inch sub and 4 new speakers and head unit what do I need to hook it up?...  im not technical so youll have to tell me in ways I can understand lol anyway Im also installing a new head unit I rly wanna make this work right so whatever I need to make it work please tell me thanks

Answers
1)   well, do you have a speaker box for your sub? Depending on your vehicle you may need a wiring kit, or you may be able to buy an adapter for your head unit. I'd recommend getting an Amp kit (for your sub) Electrical tape is a good thing to have, a mount kit for your vehicle helps too, but isn't really needed if you are handy. Oh and AA battery! Just one... what you do with that is when you are trying to figure out what wires go to which speaker you put one wire on one end and go through the wires till you hear a sound out of a speaker, process of elimination! - Mustangsrock999

2)   If you could, please update what you are buying, like the model numbers of the Subwoofer, Speakers, and Head Unit you are buying, we can guide you better in what you need. However, from what you said, the only things you are missing are an Amplifier to power your Subwoofer, an Amplifier Wiring Kit, to supply power to your amplifier, and a Subwoofer Enclosure for your Subwoofer.



If you can message me the model number or a link of the subwoofer you have purchased, I can help you look for a nice amplifier to run your subwoofer. - kaerfpl

3)   well depending on your car you may need a mounting bracket. Then how extensive your knowledge is its best to buy a wiring harness for your car. most models can be found in the auto section at walmart theyll help you get the right one. you didnt mention an amp for the subs or the speakers the sub will need an amp and enclosure. If you need an amp then youll need a wiring kit for that too wherever you buy your amp theyll get you set up with the proper wires. Crutchfield on a lot of models provides mounting hardware and wires. Hope that helps - shane


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Question 4
do i need an alternator?...  i have a 4,000 watt boss amp. and i have a 2002 honda accord. before i go ahead and hook it up. will i need a bigger alternator? or a new battery?

Answers
1)   Alternator and battery should be bought at same time. But a good battery would be better to get first, just buy a decent capacitor to go with it. A 10 farad cap would do fine on it's own until you can afford alternator and battery. - LyncHung

2)   1. Boss amps are flea market amps, and have FAKE power numbers. Yep, totally made up. That amp only has 3 30 amp fuses. So, it cannot possibly make much more than 1200 watts RMS. More like 1000 i bet.



2. So, your "4000 watt" amp is more like an 1000 watt amp. So no, you do not need a high-output alternator, at all.



Trust me, a REAL 4000 watt amp would cost well over 500 dollars :)



Although, with any stereo, you should upgrade your big three wiring, as shown here.



http://www.youtube.com/watch?v=p82xRzCr-lc&feature=player_embedded



Capacitors are useless, BTW. They only still sell them because newbs keep spreading numerous myths about them. - odinsragess

3)   true. capacitors are a lie



you should be fine. worst comes just get a yellow top in the trunk and run a battery isolator to it.



thats what I did. and I am running 800 watts times 2 on a 90 amp alternator. - Samuel W.


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Question 5
I have a 2500x1 memphis amplifier class D?...  when I turn my stereo system louder than what it is, and it hits the right bass the amp goes into protection mode, down the volume and come the bass hits. I don't know what I can do to solve this. please help me.

Answers
1)   Well what speaker are you using? There is an impedance conflict at work here. Maybe a capacitor is needed. Substandard wiring can do it, but I doubt it. - The Eagle Keeper

2)   Im not sure if the memphis 2500 is 1 ohm stable, if it isnt it could be that your running your subs at 1 ohm or lower so it is going into protection. check to make sure you are running them at the right ohms that the amp is stable at. rockford fosgate as a woofer wiring wizard that may help on their site. - d_monie3

3)   if that is 2500 watts rms you will need serious electrical upgrades to run it. an H.O. alternator , a deep cycle battery and 'the big 3' upgrade are necessary to run that much power. - dragon breath


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