Gainclones in car amp

mmmax · 21st October 2005, 07:27 PM

Has anyone tried building gainclones as car amp? I tried searching and didnt really find anything. I just thought that with gainclones it would be relatively easy and cheap design. Only tricky part is psu.

Im thinking building one, but the psu desing is open? Are there suitable desings for psu?

All comments are welcome.

sousmielie · 23rd October 2005, 12:35 PM

Hi,

Go have a look at Rod Elliot's page, he used gain clones in his car amp.

www.sound.westhost.com

Regards,
Werner

sagarverma · 25th October 2005, 04:42 PM

please tell me what is a gainclone amp?
i suppose lm3886 is also gainclone

what is gainclone amp????

sousmielie · 25th October 2005, 07:56 PM

Hi Sagarverma,

A gainclone is a amplifier made with a IC. (Chip Amp)
A solidstate amplifier is made by using discrete electronics. (Transistors, etc...)

Yes the LM3886 is a gainclone

Cheers,
Werner

motherone · 25th October 2005, 08:56 PM

Actually, chipamps and gainclones aren't one and the same. A chipamp is any amplfier built around a power opamp (LM1875/3875/3886/4780, OPA541, TDAXXXX, etc.).

Gainclones are an attempt to clone the Gaincard from 47 labs. The idea is to use the minimum number of components possible to make a stable LM1875/3875 amplifier.

Since 47 labs only uses the LM1875/3875, I would say that only amps utilizing those chips, along with the minimal external components clause above, qualify as gainclones.

Anything else is a different take (most people say "improvement") over the original gainclone idea.

As far as usinga gainclone in a car, I think you would definitely be better off going with a LM3886 or paralleled LM4780 chip for your amplifier channels. Car speakers tend to be in the 2 to 4 ohm load range, and the 1875/3875 aren't really as suited for driving those loads as the 3886 and 4780 are. A paralleled 4780 driving by a quality SMPS could easily put out 70 or so watts into a 4 ohm load, or 140 into a 2 ohm load.

sagarverma · 26th October 2005, 04:17 AM

thanks for reply.

well i have 2*tda7294 with esp smps in my car driving two woofers and tda1554q driving two speakers in a biamped setup using esp 12db/oct lr xover.

i had built lm3886 also and also lm3876tf.both are really wonderful.recomended gainclones

dito · 28th October 2005, 06:24 PM

Can you show pictures? I would like very much!

sagarverma · 29th October 2005, 04:19 AM

as i told ya all in my car.

but my lm3876tf pics can be seen on
lm3876TF hots up too much

will construct a tda7294 amp today as well as the smps.will post pics at night

dito · 29th October 2005, 10:58 AM

Congratulations!

sagarverma · 29th October 2005, 11:21 AM

amp done!!!

smps 90%.the transformer is not givimg symmetrical o/p.
will complete it by tonight for sure.

u must have benifitted from the link i posted.it has everything including the pcb layout and a proven design[me of course :-)].

21st October 2005, 07:27 PM	#1
mmmax diyAudio Member Join Date: Oct 2005	Gainclones in car amp Has anyone tried building gainclones as car amp? I tried searching and didnt really find anything. I just thought that with gainclones it would be relatively easy and cheap design. Only tricky part is psu. Im thinking building one, but the psu desing is open? Are there suitable desings for psu? All comments are welcome.

28th October 2005, 06:24 PM	#7
dito diyAudio Member Join Date: Oct 2005	pictures? Can you show pictures? I would like very much!

29th October 2005, 10:58 AM	#9
dito diyAudio Member Join Date: Oct 2005	Good work! Congratulations!

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23rd October 2005, 12:35 PM	#2
sousmielie diyAudio Member Join Date: May 2005 Location: GP (Gangstas Paradise)	Hi, Go have a look at Rod Elliot's page, he used gain clones in his car amp. www.sound.westhost.com Regards, Werner

25th October 2005, 04:42 PM	#3
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	please tell me what is a gainclone amp? i suppose lm3886 is also gainclone what is gainclone amp????

25th October 2005, 07:56 PM	#4
sousmielie diyAudio Member Join Date: May 2005 Location: GP (Gangstas Paradise)	Hi Sagarverma, A gainclone is a amplifier made with a IC. (Chip Amp) A solidstate amplifier is made by using discrete electronics. (Transistors, etc...) Yes the LM3886 is a gainclone Cheers, Werner

25th October 2005, 08:56 PM	#5
motherone diyAudio Member Join Date: Apr 2003 Location: Seattle	Actually, chipamps and gainclones aren't one and the same. A chipamp is any amplfier built around a power opamp (LM1875/3875/3886/4780, OPA541, TDAXXXX, etc.). Gainclones are an attempt to clone the Gaincard from 47 labs. The idea is to use the minimum number of components possible to make a stable LM1875/3875 amplifier. Since 47 labs only uses the LM1875/3875, I would say that only amps utilizing those chips, along with the minimal external components clause above, qualify as gainclones. Anything else is a different take (most people say "improvement") over the original gainclone idea. As far as usinga gainclone in a car, I think you would definitely be better off going with a LM3886 or paralleled LM4780 chip for your amplifier channels. Car speakers tend to be in the 2 to 4 ohm load range, and the 1875/3875 aren't really as suited for driving those loads as the 3886 and 4780 are. A paralleled 4780 driving by a quality SMPS could easily put out 70 or so watts into a 4 ohm load, or 140 into a 2 ohm load.

26th October 2005, 04:17 AM	#6
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	thanks for reply. well i have 2*tda7294 with esp smps in my car driving two woofers and tda1554q driving two speakers in a biamped setup using esp 12db/oct lr xover. i had built lm3886 also and also lm3876tf.both are really wonderful.recomended gainclones

29th October 2005, 04:19 AM	#8
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	as i told ya all in my car. but my lm3876tf pics can be seen on lm3876TF hots up too much will construct a tda7294 amp today as well as the smps.will post pics at night

29th October 2005, 11:21 AM	#10
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	amp done!!! smps 90%.the transformer is not givimg symmetrical o/p. will complete it by tonight for sure. u must have benifitted from the link i posted.it has everything including the pcb layout and a proven design[me of course :-)].

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