LM3876 for guitar?

Wynand · 31st October 2005, 12:10 PM

Would I be able to use the LM3876 chip for a guitar amp?
If so would I be able to use the schematic in the datasheet, or would I need a buffer/preamp stage with or without gain.

I've tried to look around and couldn't find something to use.

If someone's got a relatively simple design I would love to see it.

matjans · 31st October 2005, 04:27 PM

hi,

i'd use an opamp in front of a standard lm3875 based amp (if that's what you're thinking of).

take any standard opamp, give it a high input impedance, say ~500kohm, and some gain. schematics are everywhere

Nordic · 31st October 2005, 04:40 PM

Hey Wynand, is lekker innie kaap vandag!!!!!!!!!
What speaker do you have?

I must say the basic inverted config is probably easier to put to together than the noninverted setup from the datasheet. Especialy with the mono 3875 version.

sagarverma · 2nd November 2005, 05:26 AM

wynand

better use tda7294.they have better mid and up freq response.

lm series has good low freq response.it heavy on bass.

Tarzan · 2nd November 2005, 08:26 AM

Marshall is using the TDA7293 as power stage in various combos.
They are ok. Use a decent heatsink!!!
Zilog

31st October 2005, 12:10 PM	#1
Wynand diyAudio Member Join Date: Mar 2005 Location: Cape Town	LM3876 for guitar? Would I be able to use the LM3876 chip for a guitar amp? If so would I be able to use the schematic in the datasheet, or would I need a buffer/preamp stage with or without gain. I've tried to look around and couldn't find something to use. If someone's got a relatively simple design I would love to see it.

31st October 2005, 04:27 PM	#2
matjans diyAudio Member Join Date: Aug 2003 Location: Utrecht, NL	hi, i'd use an opamp in front of a standard lm3875 based amp (if that's what you're thinking of). take any standard opamp, give it a high input impedance, say ~500kohm, and some gain. schematics are everywhere __________________ Si fractum non sit, noli id reficere!

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31st October 2005, 04:40 PM	#3
Nordic diyAudio Member Join Date: Sep 2005	Hey Wynand, is lekker innie kaap vandag!!!!!!!!! What speaker do you have? I must say the basic inverted config is probably easier to put to together than the noninverted setup from the datasheet. Especialy with the mono 3875 version.

2nd November 2005, 05:26 AM	#4
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	wynand better use tda7294.they have better mid and up freq response. lm series has good low freq response.it heavy on bass.

2nd November 2005, 08:26 AM	#5
Tarzan diyAudio Member Join Date: May 2004 Location: Genk	Marshall is using the TDA7293 as power stage in various combos. They are ok. Use a decent heatsink!!! Zilog

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