[sdiy] Headphone amps using op-amps

Jean-Pierre Desrochers jpdesroc at oricom.ca
Wed Dec 12 19:17:52 CET 2012


Here is a stereo headphone amp similar to one
I built years ago and it is still rockin' !!!
This is what you need:


Le 2012-12-12 12:52, Tom Wiltshire a écrit :
> Hi all,
> If I'm driving a pair of cheap headphones from a standard op-amp
> (I've got a TL072, a MC1458 or a LF353 available - you don't get much
> more 'bog standard' than that lot) is there anything special I need 
> to
> do?
> Currently I've got a simple differential amp boosting signals from my
> dsPICs DAC output. That works fine, but plugging headphones into it
> distorts the output terribly.
> I've looked at the various "headphone amp" circuits I can find on the
> web, and none of them seem that extraordinary. For example, classic
> CMoy:
> 	http://tangentsoft.net/audio/cmoy-tutorial/misc/cmoy-tangent-sch.pdf
> Is this just a case of me trying to blast too much output into the
> headphones? I've got about 8Vpp. In which case, sticking some
> resistance in series with the outputs should do the trick, right?
> Sorry if these seem like pretty basic questions, but I haven't really
> dealt with headphones before.
> Thanks,
> Tom
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