[sdiy] favorite "magical" opamp?

[David G. Dixon]

> A lot of big name "studio grade" mixers and preamps from
> SSL/AMEK/Focusrite etc in the 80s and 90s used TL07X and 5534/5532 opamps.

This discussion has got me wondering whether the way we configure these
opamps might not be just as (or more) important than the opamps themselves.
I'm thinking about the value of the feedback/input resistors and the use of
compensation caps here.