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Restoration73 · 2nd Aug 2020, 7:30 pm

Seriously I did look into low noise for microphone pre-amps a few years back I seem to
get good results from Ferranti ZN459, and OP-27, PMI I think.
When we were building RIAA amps as a classroom project, we settled on the inexpensive
RC4558 / 4559 and went on to plot the frequency/gain a response close to ideal. These
might not meet your s/n but they were popular in audio mixers. If anything tape head
preamps are more critical as the levels can be very low.

2nd Aug 2020, 7:30 pm	#120
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: Very low noise op amp recommendations? Seriously I did look into low noise for microphone pre-amps a few years back I seem to get good results from Ferranti ZN459, and OP-27, PMI I think. When we were building RIAA amps as a classroom project, we settled on the inexpensive RC4558 / 4559 and went on to plot the frequency/gain a response close to ideal. These might not meet your s/n but they were popular in audio mixers. If anything tape head preamps are more critical as the levels can be very low.