[sdiy] headphone driver for synths

Martin Klang mars at pingdynasty.com
Wed Sep 8 18:49:17 CEST 2021


What about just using an op amp with higher current capabilities, like

TS922: Rail-to-rail input and output, Low noise: 9 nV/√Hz, High output 
current: 80 mA (able to drive 32 Ω loads)

or for split rails maybe the OPA2990?

For line level outputs that should also cope with headphones (as opposed 
to dedicated hp outs) I've been using OPA1678 which I think can output 
50mA. Have I been doin' it wrong?


Martin


On 08/09/2021 15:07, Mike Bryant wrote:
> You can trace that design back to at least Wireless World's around 
> 1974, probably a bit earlier.
>
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