CONTROLS
VOLUME: Yes.
LOW-CUT: Engages a high-pass filter that cuts at ~30Hz (minimum) and ~500Hz (maximum). It’s a 3dB cut per octave so when it’s all the way up you lose 3dB from ~250Hz, 6dB from 125Hz, etc etc. 30Hz is inaudible to the human ear (and it would only cut 3dB at 15Hz anyway) so the control is effectively out of the circuit when all the way down. It’s at its most notable when it’s up past noon. Anything before that just cuts out subharmonic mud.
BIAS: Changes the character of the fuzz from “distortion-esque” to “Velcro fuzz.” When it’s all the way down, the sound is full and throaty. The noon position on this knob is the normal Fuzz Face bias point, ~8K2 on Q2 collector. All the way up is sputtery and Velcro-esque. It’s just about the best sounding limit of this kind of control, any higher and it wouldn’t be usable.
POWER SUPPLY
You can use a variety of power sources to power your StarCrash. It supports a standard DC power supply of 9 Volts. DO NOT give the StarCrash AC or a center-positive supply, you will void the warranty. Bad move.