[sdiy] headphone driver for synths

[Martin Klang]

Cheaper perhaps in parts, not counting assembly and board space. And the 
OPA1678 is only about $0.25 in quantity. It's become my go-to audio op 
amp for all round good specs.

There's also the RC4560 which is about same price as the 5532.


Martin


On 08/09/2021 22:23, Mike Bryant wrote:
>
> Yes the OPA1678 has a higher drive current than the 5532, but using 
> both of the pair of a 5532 in parallel works out cheaper than half a 
> OPA1678 per channel provided you don’t mind the 4 times quiescent 
> current (2* per opamp and 2 opamps).
>
> Noise and distortion are very similar, and far below what is audible.
>
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