[sdiy] headphone amp

[Peachey, Dave]

Ryan,

I've never seen or built it myself, but one of the modules in the Digisound
80 range was a Stereo Power Amp including a switchable headphone amp.
Here's a link to the page on my site
http://www.digisound80.synth.net/digisound/modules/80-14/80-14.htm.

Whether this would produce an output suitable for plugging directly into
your computer sound card, that I can't say.  However, you may be able to
adapt the power amp part of the circuit to produce the required
levels/impedance characteristics.

Cheers
Dave

> -----Original Message-----
> From:	Ryan Williams [SMTP:destrukto at cox.net]
> Sent:	Thursday, July 01, 2004 8:52 AM
> To:	Synth-Diy
> Subject:	[sdiy] headphone amp
> 
> *** WARNING : This message originates from the Internet ***
> 
> 
> hi,
> 
> I was thinking of adding a headphone amplifier and also an attenuator 
> for the main output of my modular. this would be a simple little module. 
> Can anyone point me to some deccent headphone amplifier schematics? I've 
> found a few that seem quite complicated for such a little thing.
> 
> Also, about output impedances, I want this module to have a output that 
> will hook straight into my computer sound card (for now). Most of the 
> synth schematics I've looked at have a small (few hundred ohm) output 
> resistor. Is this neccesarry, or would a 1K that I use for every other 
> module be ok? (sound card has max input +2.2dbV and > 10k input impedance)
> 
> thanks---Ryan


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