Class A microphone preamp with 2 channels and EQ. Carnhill UK input and output transformers. 80 dB gain step switch. Tone button for switching input impedance. 3 coil ribbon filters. 4-stage LoCut filter (50, 80, 160, 300 Hz). Ground lift switch. If there has ever been a "holy grail" among microphone preamps, it is unanimously agreed by professionals that the legendary 1073 has shaped the pop and rock charts of the last 50 years like no other. Warm Audio offers the WA73 series with single and dual-channel preamps (with and without EQ) that are a careful homage to the British original. The devices in the WA73 series are boutique preamps that can be used both in the studio and live. The classic circuitry used harmonizes fantastically with any type of microphone. Even ribbon and dynamic microphones receive a crystal-clear yet creamy topping. From tracking to mastering, you are well-equipped for every task thanks to the sensible features and confident sound.