I'm a bit out of touch with modern OPAs but note there are a number of new DIY mikes using FET OPAs like Homero's Charis and the OPA Alice.
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I'm after a FET OPA with less than 3.5nV/rtHz noise @ 1kHz and good 1/f, popcorn noise bla bla.
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What do you guys use and recommend ??
