Warm Audio WA73, 1-Channel Microphone Preamp in British 1073 Style, Discrete Class A circuit, Carnhill transformer, 80 dB gain, Incremented potentiometer, Tone button for switching the input impedance, Switch for phase reversal, Low-cut filter 4-step switchable (50, 80, 160, 300 Hz), LED meter, 48V Phantom power, XLR microphone input, Line input: 6.3 mm jack, Instrument input: 6.3 mm jack, Insert input and output: 6.3 mm jack, Line output: XLR and 6.3 mm jack, Integrated power supply unit (115/230 V), Build: 19