Class A Bal Pre-amplifier

Solid-State Balanced Microphone Preamplifier

I have successfully tweaked this design to have as little as 2.5dB of gain or as much as 70dB of gain.

In my case, I set the gain adjust to a fixed level. I used Jensen JT-11P-1 transformers on the input and JT-11-FLCF transformers on the output, with a relatively simple attenuator between the input transformer and the input of the circuit.

That's what I'm currently listening to, and it is a great preamp. The distortion is excellent and it holds up well in an actual listening test.
 
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