The 2B Booster a transparent booster which takes away the strident treble issues when used in high-volume situations. It's made from the warm preamp in the Supa-Trem 1 and 2 or the True-Path ABY switchers. The Gain knob boost the signal up to 20dB. The Dynamics knob controls an added Germanium diode Limiter circuit that tightens up the low end and helps you pop out in the mix. It can be powered in 9V and 18V DC. Its unity-gain JFET amp buffers your signal when the pedal is turned OFF.