8 Watt Audio Amp

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Here is the schematic for an 8 watt audio amp. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp.

Schematic

LM383 Pinout

Parts

Part	Total Qty.	Description	Substitutions
C1	1	10uf Electrolytic Capacitor
C2	1	470uf Electrolytic Capacitor
C3	1	0.1uF Disc Capacitor
C4	1	2000uf Electrolytic Capacitor	2200uF
R1	1	2.2 Ohm Resistor	Anything Within 10%
R2	1	220 Ohm Resistor	Anything Within 10%
IC1	1	LM383 8 Watt Amp IC	ECG1232, TDA2002

Notes

IC1 MUST be installed on a heat sink.

C3 is for filtering and to prevent oscillation and should not be omitted.

The circuit can be built on a perf board, universal solder board or PC board, the PC board is preferred. I built the circuit on a perf board and had to add a low value inductor at the input to prevent oscillation.

The circuit draws about 880 ma at 12 V.

By swapping the values of R1 and R3, you can turn this amplifier into a guitar amp with no preamp required.

If you can't find 2000uF, then replace C4 with a 2200uF unit.

If you add a 0.2uF capaciitor in series with a 1 ohm resistor to the output you can prevent oscillation of the circuit under certain conditions.

Thanks to James Maloway for redrawing the schematic. The mew image is much easier to read then the old one.

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Comments

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anonymous 8 Watt Audio Amp Wednesday, September 02, 2015 1:32:57 AM

The above circuit will NOT work as is, due to several reasons: 1.) Biasing resistors missing (Add a 20K ohm from +12V to pin 3, and another one from pin 3 to ground - value NOT super critical. 2.) C2 should really be connected in series with R1 (rather than as shown). 3.) Will NOT get 8 watts out of this design. Even if the signal swings rail-to-rail, the most you can get is 2.25 watts (calculations based on a sine-wave audio signal).

anonymous 8 Watt Audio Amp Wednesday, October 29, 2014 7:41:30 AM

I dont have the IC LM383 instead I've LM386 will it work?

jayson baluyot 8 Watt Audio Amp Monday, September 01, 2014 10:15:00 PM

Hi, i'm a new student i'd really like to try this circuit ,but is this circuit really work?

anonymous 8 Watt Audio Amp Wednesday, June 11, 2014 9:26:47 AM

how does it work? I mean its function...

mark 8 Watt Audio Amp Wednesday, February 06, 2013 9:27:21 PM

i am only a high school student.. but i really like electronics. that's why i wnt to make this 8 watts audio amp.. can u send me the schematic diagram and the PCB Layout of this.. inorder for me to make it easily..

anonymous 8 Watt Audio Amp Saturday, March 17, 2012 2:19:32 PM

i built this amp. . But it produces high howling noise. . Though there is a little signal is there. . Iam new to electronics. And i cant solve this problem. . Pls help me. .

juliud c, horfilla 8 Watt Audio Amp Thursday, January 12, 2012 4:15:07 PM

12volts is the exact powersupply for that audio amplifier.

freddie butch despi 8 Watt Audio Amp Thursday, January 05, 2012 10:34:20 PM

what is the appropriate power supply to be used o that amplifier?

julius c.horfilla BSIE TRADE SCHOOL.MJ CUENCO AVE,CEBU CITY PHILS. 8 Watt Audio Amp Monday, October 24, 2011 7:14:32 PM

i assembled that LM383 8WATTS power amplifier it's a heavy duty and excellent amplifier. in cebu we used audio booster for more power output of that lm383 power amplifier.also connect a tone control bass/treble circuit for best results.

anonymous jhun 8 Watt Audio Amp Saturday, May 15, 2010 8:13:09 PM

very wrong pin configuration. according to the datasheet of the said IC pin-5 is the output but on the schematic diagram pin-8 is the output & pin1 and pin2 is the non inverted and inverted input. please correct the diagram.

anonymous 8 Watt Audio Amp Wednesday, November 11, 2009 2:58:46 PM

The circuit diagram clearly shows 'R3' and the text refers to 'R3', yet there are only 2 resistors in the component list. (The component list appears to be correct in this). :)

Paul 8 Watt Audio Amp Monday, October 26, 2009 3:22:55 AM

LM383 datasheet found at national.com Condenser mic's are microphones that convert mechanical vibration to electrical signals via vibrating charged parallel plates (condenser -> capacitor). The mic needs biasing because the plates have to have a charge maintained for the thing to function.

Angelo 8 Watt Audio Amp Wednesday, May 27, 2009 6:53:50 AM

The pin connections are all wrong. I tried looking for other circuit diagrams in the internet an it worked.

anonymous 8 Watt Audio Amp Tuesday, April 28, 2009 7:39:13 PM

why do condenser mics need biasing?????????????//

Chris 8 Watt Audio Amp Saturday, January 17, 2009 10:15:41 AM

the connections of the pins of the ic are WRONG! the ic heat up and i have checked over and over but the problem is from the schematic diagram... please help me to solve out this problem!

ZIA 8 Watt Audio Amp Wednesday, November 12, 2008 5:25:20 AM

These pins configration is abslutely wrong

gerard rendon 60 Watt Audio Amp Monday, April 07, 2008 12:59:40 AM

im doingin a project on 60watt audio amplifier,how do i go about it?

anonymous 8 Watt Audio Amp Friday, March 07, 2008 1:16:29 AM

the circuit is wrong,pin numbers do not match the specification sheet

chaminda 8 Watt Audio Amp Saturday, March 01, 2008 11:55:08 AM

Pl Chek LM383 Pinout. Pin No .4 is Ground. But Curicuit Pin No. 04 is OutPut. It Rong.

Audioguru 8 Watt Audio Amp Wednesday, February 06, 2008 4:57:15 PM

This IC is obsolete and has not been made for 12 years. The pins numbers on the schematic are completely wrong. The schematic is missing important parts. Make the circuit on the datasheet of the TDA2003 instead. It is available, shows all the parts and even shows a pcb design.

joyce 8 Watt Audio Amp Wednesday, January 23, 2008 3:39:18 AM

can u send to me the explanation and calcution for this circuit

natal edmund 60watt audio amplifier Thursday, January 10, 2008 7:17:00 AM

i am invovled in a project on 60watt audio amplifier,how do i go about it?

anonymous 8 Watt Audio Amp Tuesday, January 08, 2008 4:04:12 AM

its a great amp and really useful but rubish too

anonymous 8 Watt Audio Amp Tuesday, January 01, 2008 3:57:10 AM

there is no volume controller

R. Rhine 8 Watt Audio Amp Sunday, December 23, 2007 4:28:45 AM

Very useful little circuit, built it out of spare parts in just a few minutes. I'm listening to it right now. Not really hi-fi, but with standard components its more than good enough for something like a table radio, car amplifier, or PC speaker system. It has more than enough juice to power most full range speakers, and only takes up about two square inches of board space. It works best with 4� speakers, but is capable of driving 8�s as well. I STRONGLY recommend against building this without adding an 0.22 �F capacitor and 1� resistor in series from the input of C4 to ground (See LM383's datasheet), failing to do so will send the circuit into a potentially destructive oscillation. Also, be sure to check the datasheet (http://www.datasheetcatalog.com/) for your specific manufacturer and model of IC, the pinout may be different depending on the chip's manufacturer. The current production version of LM383 is NTE's NTE1232 IC, which will also work well in this circuit.

anonymous 8 Watt Audio Amp Tuesday, December 18, 2007 6:32:20 PM

GREAT CIRCUIT but for c3 i would use a 2200uf cap instead of .1uf capacitor the .1 cap blew up on me lol

Saqib Munawwar 200 Watt Audio Amp Saturday, December 08, 2007 2:55:30 PM

Is there are true and verified 200Watt Audio Amplifier?

Ikpor B. 13 Watt Audio Amp Monday, December 03, 2007 9:59:14 AM

please me in the construction of a 13amps audio amplifier thank you

Jazz 8 Watt Audio Amp Monday, December 03, 2007 9:00:59 AM

pls, the Schematic is true?

Harish Y 8 Watt Audio Amp Tuesday, November 20, 2007 8:24:42 AM

The circuit looks simple in construction as well as working.

jovial_cynic 8 Watt Audio Amp Tuesday, November 13, 2007 3:25:30 PM

Folks: Note that #5 in the picture is the supply voltage. In the schematic, #8 is where the 12v supply goes in. #8 and #5 describe the same pin.

nimbus 8 Watt Audio Amp Saturday, November 10, 2007 4:42:50 AM

your circuit is very simple yet very nice to make... i'm not yet done working on it so may i ask if this will work well?how about the noise that may be produced?..if there is such...U thanks

duma 8 Watt Audio Amp Wednesday, November 07, 2007 9:18:51 AM

what makes each op amp different? shouldnt they all be similar

syed faisal mukhtar kazmi 8 Watt Audio Amp Friday, October 26, 2007 6:10:11 AM

nice amp. it is very easy.

syed faisal mukhtar kazmi 8 Watt Audio Amp Friday, October 26, 2007 6:08:52 AM

It is very simple and easy to make.

anonymous 8 Watt Audio Amp Monday, October 15, 2007 10:21:36 PM

hi im johnny, the circuit you have posted will not match in the ic pin can you pls. post another circuit

tahmid 8 Watt Audio Amp Friday, October 05, 2007 9:13:43 AM

the pins do not match in the diagram and the pin layout?

Manjunath.c.k 8 Watt Audio Amp Saturday, September 29, 2007 1:55:59 AM

Hello, Your pins shown in the circuit does not match with the one shown in the picture of ic shown below. can you pls explain........

Manjunath.c.k 8 Watt Audio Amp Saturday, September 29, 2007 1:53:00 AM

The IC pins are not matching as showin in diagram and the picture below. Output is given to ground i cant understand. can you pls explain and help me in making the same with 6v input.

Manjunath.c.k 8 Watt Audio Amp Friday, September 28, 2007 2:33:31 AM

Sir, Pls send me the circuit of the same if its with 6v input. can you pls help. i had tried this and is worthy .

del 8 Watt Audio Amp Wednesday, September 12, 2007 8:29:41 PM

gud am! can you pls.discuss the effect of removing or detaching one electronic component to its function. Such that when the given value of a capacitor is removed or even when a resistor and so on.. tnx!

vher 8 Watt Audio Amp Sunday, September 09, 2007 12:07:11 AM

sir how i can view a block diagram of this circuit.

jhenards 8 Watt Audio Amp Wednesday, September 05, 2007 8:37:15 AM

good day! im a student of holy name university in philippines..can you please send me a complte schematic diagram and and hte pcd layout for tha above topic? pls. sens it to my email..i badly need this for my project next month..thank you very much..

satish 8 Watt Audio Amp Thursday, August 30, 2007 3:35:07 AM

At present my system audio is around 3-4watt.i want 8 watt output. Plz send me the schematic for same. it is urgent

Daniel 8 Watt Audio Amp Friday, August 24, 2007 2:41:31 AM

nice amp, so simple and easy to do.

satya 8 Watt Audio Amp Thursday, August 23, 2007 9:36:47 AM

if we are use less than 12 v dc what happens,i want that the ckt operated with 6v is possible or not please kindly help me.

aniefiok watt audio amplifier with tone control and output level indicator Thursday, August 09, 2007 9:06:58 AM

plsz, am student of ebonyi state university.i need the circuit diagram,schematics and theoretical procedure for the above topic.am using nit for my project.plsz i need a report urgently.thanks.

anonymous 8 Watt Audio Amp Saturday, August 04, 2007 2:02:13 AM

your schematic is not matching up w/the IC pinouts given right below it, u got the input comin in on the ground pin, and u've got the output going to ground, just to name a couple

anonymous 8 Watt Audio Amp Saturday, August 04, 2007 12:47:29 AM

hi anonymous. i m a student of B.TECH 2 year & have got a project on 8watt audio amp.can u help me in making its report.i will be highly obliged.

Liam 8 Watt Audio Amp in Conjunction with the FM Transmitter Friday, August 03, 2007 11:37:52 AM

Could this be used to send the signal of the FM Transmitter farther? (Not the 3W transmitter, but the smaller one) If so, how exactly would I set that up, and how far would the new signal go? Thanks.
(Editor's notes: No.)

jel bautista 8 Watt Audio Amp Friday, July 13, 2007 10:39:02 PM

can you send me a PCB design of 8 Watt Audio Amplifiers and 100 watt audio amplifiers?

hyedenny 8 Watt Audio Amp Sunday, July 08, 2007 4:37:35 PM

hi - CAUTION - The pin numbers on your schematic dont make sense! They dont match the pinouts on the datasheet or the IC diagram below the schematic.

anonymous 8 Watt Audio Amp Thursday, June 28, 2007 3:52:48 AM

no1 :thanks for circuit no2 :ther ar small rong pin no 8 not 8 but 5

anonymous 8 Watt Audio Amp Monday, June 18, 2007 5:46:45 AM

can this amp operate by cell batter

umar 8 Watt Audio Amp Tuesday, May 29, 2007 2:50:56 PM

plz send me schematic with complete report of 8 to 10 watt or 20 to 22 watt amplifier .i need it urgently

anonymous 8 Watt Audio Amp Tuesday, May 08, 2007 8:38:41 AM

can the lm383 be replaced with a lm386? also how would i hook up an mp3 player to it?

me 8 Watt Audio Amp Wednesday, May 02, 2007 7:47:10 AM

how would you make the circut into an operational mini bass amp with this circuit, and how would youo control the volume

anonymous 8 Watt Audio Amp Saturday, April 14, 2007 4:31:10 AM

Built this circuit for a parabolic amplifier. Few errors in the schematic. Had to tweak it a little for headphones instead of speaker. I used 1M ohm for R3 although it might need to be altered for use with a speaker. (R3 should be listed) rheostat or potentiometer for volume control. Overall it's not a bad circuit. Cheap and effective. I used it with the parabolic dish to listen to my neighbors talking last night. Boy was that FUN!

anonymous i want the circuit digram of 3 transtistor audio amplifier Friday, April 13, 2007 12:59:10 PM

can any 1 gve me the circuit diagram of amplifier in whicjh 3 transistor is used..if any one have dn mail me..plz...

anonymous 8 Watt Audio Amp Sunday, April 08, 2007 5:11:03 PM

i buld this circuits but it made so nosy

prashanth 8 Watt Audio Amp Monday, April 02, 2007 4:56:43 AM

could u please send audio amplifier which input through mic

Trevor 8 Watt Audio Amp Saturday, March 31, 2007 10:38:14 PM

You should note in the parts list what the value of resister 3 is.

Alan 8 Watt Audio Amp Wednesday, March 28, 2007 2:15:28 PM

A couple of questions, what are the resistors R1 &R2 or R1 & R3. Also what resistors would you substitute to make into a guitar amp. And can one of them be a pot for volume? Thanks

anonymous 8 Watt Audio Amp Sunday, March 25, 2007 1:36:11 AM

do you know where i can get a hold of the ic digikey has it but i dont want to have to order in bulk

Amit Audio Amp Thursday, March 22, 2007 1:22:40 AM

I want some amplifier ckts

Steven Moughan 8 Watt Audio Amp Wednesday, March 21, 2007 12:12:21 PM

There are errors in this schematic, check the pinout given against the pins listed in the schematic.

john raul 8 Watt Audio Amp Tuesday, March 06, 2007 1:55:56 AM

this circuit is suitable for motorcycle audio system... it is very easy to make and it sounds great!

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anonymous	8 Watt Audio Amp	Wednesday, September 02, 2015 1:32:57 AM
The above circuit will NOT work as is, due to several reasons: 1.) Biasing resistors missing (Add a 20K ohm from +12V to pin 3, and another one from pin 3 to ground - value NOT super critical. 2.) C2 should really be connected in series with R1 (rather than as shown). 3.) Will NOT get 8 watts out of this design. Even if the signal swings rail-to-rail, the most you can get is 2.25 watts (calculations based on a sine-wave audio signal).
anonymous	8 Watt Audio Amp	Wednesday, October 29, 2014 7:41:30 AM
I dont have the IC LM383 instead I've LM386 will it work?
jayson baluyot	8 Watt Audio Amp	Monday, September 01, 2014 10:15:00 PM
Hi, i'm a new student i'd really like to try this circuit ,but is this circuit really work?
anonymous	8 Watt Audio Amp	Wednesday, June 11, 2014 9:26:47 AM
how does it work? I mean its function...
mark	8 Watt Audio Amp	Wednesday, February 06, 2013 9:27:21 PM
i am only a high school student.. but i really like electronics. that's why i wnt to make this 8 watts audio amp.. can u send me the schematic diagram and the PCB Layout of this.. inorder for me to make it easily..
anonymous	8 Watt Audio Amp	Saturday, March 17, 2012 2:19:32 PM
i built this amp. . But it produces high howling noise. . Though there is a little signal is there. . Iam new to electronics. And i cant solve this problem. . Pls help me. .
juliud c, horfilla	8 Watt Audio Amp	Thursday, January 12, 2012 4:15:07 PM
12volts is the exact powersupply for that audio amplifier.
freddie butch despi	8 Watt Audio Amp	Thursday, January 05, 2012 10:34:20 PM
what is the appropriate power supply to be used o that amplifier?
julius c.horfilla BSIE TRADE SCHOOL.MJ CUENCO AVE,CEBU CITY PHILS.	8 Watt Audio Amp	Monday, October 24, 2011 7:14:32 PM
i assembled that LM383 8WATTS power amplifier it's a heavy duty and excellent amplifier. in cebu we used audio booster for more power output of that lm383 power amplifier.also connect a tone control bass/treble circuit for best results.
anonymous jhun	8 Watt Audio Amp	Saturday, May 15, 2010 8:13:09 PM
very wrong pin configuration. according to the datasheet of the said IC pin-5 is the output but on the schematic diagram pin-8 is the output & pin1 and pin2 is the non inverted and inverted input. please correct the diagram.
anonymous	8 Watt Audio Amp	Wednesday, November 11, 2009 2:58:46 PM
The circuit diagram clearly shows 'R3' and the text refers to 'R3', yet there are only 2 resistors in the component list. (The component list appears to be correct in this). :)
Paul	8 Watt Audio Amp	Monday, October 26, 2009 3:22:55 AM
LM383 datasheet found at national.com Condenser mic's are microphones that convert mechanical vibration to electrical signals via vibrating charged parallel plates (condenser -> capacitor). The mic needs biasing because the plates have to have a charge maintained for the thing to function.
Angelo	8 Watt Audio Amp	Wednesday, May 27, 2009 6:53:50 AM
The pin connections are all wrong. I tried looking for other circuit diagrams in the internet an it worked.
anonymous	8 Watt Audio Amp	Tuesday, April 28, 2009 7:39:13 PM
why do condenser mics need biasing?????????????//
Chris	8 Watt Audio Amp	Saturday, January 17, 2009 10:15:41 AM
the connections of the pins of the ic are WRONG! the ic heat up and i have checked over and over but the problem is from the schematic diagram... please help me to solve out this problem!
ZIA	8 Watt Audio Amp	Wednesday, November 12, 2008 5:25:20 AM
These pins configration is abslutely wrong
gerard rendon	60 Watt Audio Amp	Monday, April 07, 2008 12:59:40 AM
im doingin a project on 60watt audio amplifier,how do i go about it?
anonymous	8 Watt Audio Amp	Friday, March 07, 2008 1:16:29 AM
the circuit is wrong,pin numbers do not match the specification sheet
chaminda	8 Watt Audio Amp	Saturday, March 01, 2008 11:55:08 AM
Pl Chek LM383 Pinout. Pin No .4 is Ground. But Curicuit Pin No. 04 is OutPut. It Rong.
Audioguru	8 Watt Audio Amp	Wednesday, February 06, 2008 4:57:15 PM
This IC is obsolete and has not been made for 12 years. The pins numbers on the schematic are completely wrong. The schematic is missing important parts. Make the circuit on the datasheet of the TDA2003 instead. It is available, shows all the parts and even shows a pcb design.
joyce	8 Watt Audio Amp	Wednesday, January 23, 2008 3:39:18 AM
can u send to me the explanation and calcution for this circuit
natal edmund	60watt audio amplifier	Thursday, January 10, 2008 7:17:00 AM
i am invovled in a project on 60watt audio amplifier,how do i go about it?
anonymous	8 Watt Audio Amp	Tuesday, January 08, 2008 4:04:12 AM
its a great amp and really useful but rubish too
anonymous	8 Watt Audio Amp	Tuesday, January 01, 2008 3:57:10 AM
there is no volume controller
R. Rhine	8 Watt Audio Amp	Sunday, December 23, 2007 4:28:45 AM
Very useful little circuit, built it out of spare parts in just a few minutes. I'm listening to it right now. Not really hi-fi, but with standard components its more than good enough for something like a table radio, car amplifier, or PC speaker system. It has more than enough juice to power most full range speakers, and only takes up about two square inches of board space. It works best with 4� speakers, but is capable of driving 8�s as well. I STRONGLY recommend against building this without adding an 0.22 �F capacitor and 1� resistor in series from the input of C4 to ground (See LM383's datasheet), failing to do so will send the circuit into a potentially destructive oscillation. Also, be sure to check the datasheet (http://www.datasheetcatalog.com/) for your specific manufacturer and model of IC, the pinout may be different depending on the chip's manufacturer. The current production version of LM383 is NTE's NTE1232 IC, which will also work well in this circuit.
anonymous	8 Watt Audio Amp	Tuesday, December 18, 2007 6:32:20 PM
GREAT CIRCUIT but for c3 i would use a 2200uf cap instead of .1uf capacitor the .1 cap blew up on me lol
Saqib Munawwar	200 Watt Audio Amp	Saturday, December 08, 2007 2:55:30 PM
Is there are true and verified 200Watt Audio Amplifier?
Ikpor B.	13 Watt Audio Amp	Monday, December 03, 2007 9:59:14 AM
please me in the construction of a 13amps audio amplifier thank you
Jazz	8 Watt Audio Amp	Monday, December 03, 2007 9:00:59 AM
pls, the Schematic is true?
Harish Y	8 Watt Audio Amp	Tuesday, November 20, 2007 8:24:42 AM
The circuit looks simple in construction as well as working.
jovial_cynic	8 Watt Audio Amp	Tuesday, November 13, 2007 3:25:30 PM
Folks: Note that #5 in the picture is the supply voltage. In the schematic, #8 is where the 12v supply goes in. #8 and #5 describe the same pin.
nimbus	8 Watt Audio Amp	Saturday, November 10, 2007 4:42:50 AM
your circuit is very simple yet very nice to make... i'm not yet done working on it so may i ask if this will work well?how about the noise that may be produced?..if there is such...U thanks
duma	8 Watt Audio Amp	Wednesday, November 07, 2007 9:18:51 AM
what makes each op amp different? shouldnt they all be similar
syed faisal mukhtar kazmi	8 Watt Audio Amp	Friday, October 26, 2007 6:10:11 AM
nice amp. it is very easy.
syed faisal mukhtar kazmi	8 Watt Audio Amp	Friday, October 26, 2007 6:08:52 AM
It is very simple and easy to make.
anonymous	8 Watt Audio Amp	Monday, October 15, 2007 10:21:36 PM
hi im johnny, the circuit you have posted will not match in the ic pin can you pls. post another circuit
tahmid	8 Watt Audio Amp	Friday, October 05, 2007 9:13:43 AM
the pins do not match in the diagram and the pin layout?
Manjunath.c.k	8 Watt Audio Amp	Saturday, September 29, 2007 1:55:59 AM
Hello, Your pins shown in the circuit does not match with the one shown in the picture of ic shown below. can you pls explain........
Manjunath.c.k	8 Watt Audio Amp	Saturday, September 29, 2007 1:53:00 AM
The IC pins are not matching as showin in diagram and the picture below. Output is given to ground i cant understand. can you pls explain and help me in making the same with 6v input.
Manjunath.c.k	8 Watt Audio Amp	Friday, September 28, 2007 2:33:31 AM
Sir, Pls send me the circuit of the same if its with 6v input. can you pls help. i had tried this and is worthy .
del	8 Watt Audio Amp	Wednesday, September 12, 2007 8:29:41 PM
gud am! can you pls.discuss the effect of removing or detaching one electronic component to its function. Such that when the given value of a capacitor is removed or even when a resistor and so on.. tnx!
vher	8 Watt Audio Amp	Sunday, September 09, 2007 12:07:11 AM
sir how i can view a block diagram of this circuit.
jhenards	8 Watt Audio Amp	Wednesday, September 05, 2007 8:37:15 AM
good day! im a student of holy name university in philippines..can you please send me a complte schematic diagram and and hte pcd layout for tha above topic? pls. sens it to my email..i badly need this for my project next month..thank you very much..
satish	8 Watt Audio Amp	Thursday, August 30, 2007 3:35:07 AM
At present my system audio is around 3-4watt.i want 8 watt output. Plz send me the schematic for same. it is urgent
Daniel	8 Watt Audio Amp	Friday, August 24, 2007 2:41:31 AM
nice amp, so simple and easy to do.
satya	8 Watt Audio Amp	Thursday, August 23, 2007 9:36:47 AM
if we are use less than 12 v dc what happens,i want that the ckt operated with 6v is possible or not please kindly help me.
aniefiok	watt audio amplifier with tone control and output level indicator	Thursday, August 09, 2007 9:06:58 AM
plsz, am student of ebonyi state university.i need the circuit diagram,schematics and theoretical procedure for the above topic.am using nit for my project.plsz i need a report urgently.thanks.
anonymous	8 Watt Audio Amp	Saturday, August 04, 2007 2:02:13 AM
your schematic is not matching up w/the IC pinouts given right below it, u got the input comin in on the ground pin, and u've got the output going to ground, just to name a couple
anonymous	8 Watt Audio Amp	Saturday, August 04, 2007 12:47:29 AM
hi anonymous. i m a student of B.TECH 2 year & have got a project on 8watt audio amp.can u help me in making its report.i will be highly obliged.
Liam	8 Watt Audio Amp in Conjunction with the FM Transmitter	Friday, August 03, 2007 11:37:52 AM
Could this be used to send the signal of the FM Transmitter farther? (Not the 3W transmitter, but the smaller one) If so, how exactly would I set that up, and how far would the new signal go? Thanks. (Editor's notes: No.)
jel bautista	8 Watt Audio Amp	Friday, July 13, 2007 10:39:02 PM
can you send me a PCB design of 8 Watt Audio Amplifiers and 100 watt audio amplifiers?
hyedenny	8 Watt Audio Amp	Sunday, July 08, 2007 4:37:35 PM
hi - CAUTION - The pin numbers on your schematic dont make sense! They dont match the pinouts on the datasheet or the IC diagram below the schematic.
anonymous	8 Watt Audio Amp	Thursday, June 28, 2007 3:52:48 AM
no1 :thanks for circuit no2 :ther ar small rong pin no 8 not 8 but 5
anonymous	8 Watt Audio Amp	Monday, June 18, 2007 5:46:45 AM
can this amp operate by cell batter
umar	8 Watt Audio Amp	Tuesday, May 29, 2007 2:50:56 PM
plz send me schematic with complete report of 8 to 10 watt or 20 to 22 watt amplifier .i need it urgently
anonymous	8 Watt Audio Amp	Tuesday, May 08, 2007 8:38:41 AM
can the lm383 be replaced with a lm386? also how would i hook up an mp3 player to it?
me	8 Watt Audio Amp	Wednesday, May 02, 2007 7:47:10 AM
how would you make the circut into an operational mini bass amp with this circuit, and how would youo control the volume
anonymous	8 Watt Audio Amp	Saturday, April 14, 2007 4:31:10 AM
Built this circuit for a parabolic amplifier. Few errors in the schematic. Had to tweak it a little for headphones instead of speaker. I used 1M ohm for R3 although it might need to be altered for use with a speaker. (R3 should be listed) rheostat or potentiometer for volume control. Overall it's not a bad circuit. Cheap and effective. I used it with the parabolic dish to listen to my neighbors talking last night. Boy was that FUN!
anonymous	i want the circuit digram of 3 transtistor audio amplifier	Friday, April 13, 2007 12:59:10 PM
can any 1 gve me the circuit diagram of amplifier in whicjh 3 transistor is used..if any one have dn mail me..plz...
anonymous	8 Watt Audio Amp	Sunday, April 08, 2007 5:11:03 PM
i buld this circuits but it made so nosy
prashanth	8 Watt Audio Amp	Monday, April 02, 2007 4:56:43 AM
could u please send audio amplifier which input through mic
Trevor	8 Watt Audio Amp	Saturday, March 31, 2007 10:38:14 PM
You should note in the parts list what the value of resister 3 is.
Alan	8 Watt Audio Amp	Wednesday, March 28, 2007 2:15:28 PM
A couple of questions, what are the resistors R1 &R2 or R1 & R3. Also what resistors would you substitute to make into a guitar amp. And can one of them be a pot for volume? Thanks
anonymous	8 Watt Audio Amp	Sunday, March 25, 2007 1:36:11 AM
do you know where i can get a hold of the ic digikey has it but i dont want to have to order in bulk
Amit	Audio Amp	Thursday, March 22, 2007 1:22:40 AM
I want some amplifier ckts
Steven Moughan	8 Watt Audio Amp	Wednesday, March 21, 2007 12:12:21 PM
There are errors in this schematic, check the pinout given against the pins listed in the schematic.
john raul	8 Watt Audio Amp	Tuesday, March 06, 2007 1:55:56 AM
this circuit is suitable for motorcycle audio system... it is very easy to make and it sounds great!