A car amp question

Kraken · 28th August 2006, 09:51 PM

Hello.I am new here and i came here via a google's search.
I like your work here and everyone can learn many things here.
Congrats...
I have a question.I would like to build a (good) car amplifier.
Which chip do you suggest me to use?
I've found these:
-TDA1562Q (Phillips)
-TDA7560 (ST).
But i like also and the LM3875 kit (from Audiosector.com) which is a ready kit with PCB's but is there any good transformer from 12-14,4V to xxV ?(the volts needed to work the LM3875 kit).
Thanks in advance.

Leolabs · 29th August 2006, 02:39 AM

in term of cost effective,the TDA7560 is a winner here.

gmphadte · 29th August 2006, 07:21 AM

For making the power amp from LM3875, u will have to build a DC-DC converter.
Visit bas.elitesecurity.org/

Gajanan Phadte

elaar · 29th August 2006, 10:55 AM

Hi, ESP projects site lists information/circuit to design a pretty good smps for such an application:

http://sound.westhost.com/project89.htm

Personally i'd go that route, otherwise your power output is very limited.

Alex

Kraken · 29th August 2006, 03:56 PM

Thanks for your answers and links.I will go with LM3875 and a DC-DC converter.
But i have a CarPC with Audigy 2 (Creative).
Can i connect them directly from card's output or another circuit (or something else) is needed?

gmphadte · 30th August 2006, 04:12 AM

U have to know the output level of your source (the card) and the input signal level required for the amp u will construct. To get the maximum output from this power amp, the input should be equal to or greater than required. If it is greater, the solution is simple. Otherwise a voltage gain circuit (pre amp) will be required.

Gajanan Phadte

mateo88 · 30th August 2006, 07:32 AM

http:// bas.elitesecurity.org/

Is there anyone that could kindly point me to a translator capable of translating that site? Looks, like a promising build for me, if I understood Serbian.

Kraken · 31st August 2006, 01:29 PM

Quote:

Originally posted by gmphadte
U have to know the output level of your source (the card) and the input signal level required for the amp u will construct. To get the maximum output from this power amp, the input should be equal to or greater than required. If it is greater, the solution is simple. Otherwise a voltage gain circuit (pre amp) will be required.

Gajanan Phadte

I ordered the components for amp.When is ready i will try it and see if a pre amp is required.
Thanks

28th August 2006, 09:51 PM	#1
Kraken diyAudio Member Join Date: Jun 2006	A car amp question Hello.I am new here and i came here via a google's search. I like your work here and everyone can learn many things here. Congrats... I have a question.I would like to build a (good) car amplifier. Which chip do you suggest me to use? I've found these: -TDA1562Q (Phillips) -TDA7560 (ST). But i like also and the LM3875 kit (from Audiosector.com) which is a ready kit with PCB's but is there any good transformer from 12-14,4V to xxV ?(the volts needed to work the LM3875 kit). Thanks in advance.

29th August 2006, 07:21 AM	#3
gmphadte diyAudio Member Join Date: Jul 2003 Location: Dona paula, Goa	DC-Dc converter For making the power amp from LM3875, u will have to build a DC-DC converter. Visit bas.elitesecurity.org/ Gajanan Phadte

30th August 2006, 04:12 AM	#6
gmphadte diyAudio Member Join Date: Jul 2003 Location: Dona paula, Goa	Preamp U have to know the output level of your source (the card) and the input signal level required for the amp u will construct. To get the maximum output from this power amp, the input should be equal to or greater than required. If it is greater, the solution is simple. Otherwise a voltage gain circuit (pre amp) will be required. Gajanan Phadte

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29th August 2006, 02:39 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	in term of cost effective,the TDA7560 is a winner here.

29th August 2006, 10:55 AM	#4
elaar diyAudio Member Join Date: Oct 2005	Hi, ESP projects site lists information/circuit to design a pretty good smps for such an application: http://sound.westhost.com/project89.htm Personally i'd go that route, otherwise your power output is very limited. Alex

29th August 2006, 03:56 PM	#5
Kraken diyAudio Member Join Date: Jun 2006	Thanks for your answers and links.I will go with LM3875 and a DC-DC converter. But i have a CarPC with Audigy 2 (Creative). Can i connect them directly from card's output or another circuit (or something else) is needed?

30th August 2006, 07:32 AM	#7
mateo88 diyAudio Member Join Date: May 2004 Location: Argyle, Texas	http:// bas.elitesecurity.org/ Is there anyone that could kindly point me to a translator capable of translating that site? Looks, like a promising build for me, if I understood Serbian.

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