Microphone preamplifier. A faithful recreation.
Georgetown has things you can feel.
A faithful recreation of the RCA BA-31B. Germanium transistors. Iron-core transformers. Optocoupler gain staging. USB MIDI remote control for DAW recall — the only modern part of the signal path.
The original BA-31B is a tube preamp from 1947. We rebuilt the topology with germanium, then put the controls within reach of a DAW via USB MIDI — without ever putting them behind a screen.
60–90 seconds. Fingers on knobs. The DAW responding.
Stage, studio, lab, classroom, anything else. Send us yours.
Tracking vocals through the BA-31B recreation. DAW recall via Knobster.
On a vocal chain in front of the desk.