It’s called a Preamp pedal because it’s based on the Preamp circuit from the Benson Amps Chimera 30 Watt Guitar Amplifier but substitutes FET Transistors for the vacuume tubes.

Power Requirments: 9VDC Boss Style adaptor or battery 50ma

CONTROLS :

Gain (Distortion)

Bass (high pass filter)

Treble (low pass filter)

Master Volume