www.tunnelvisionmusic.com - The ZVex Vextron Mastotron fuzz is based on a heavy silicon fuzz design using a 2N2222 transistor ala Jimi Hendrix. Zachary Vex says it has a bumble bee quality that stays solid for all settings. Knobs on the fuzzy little fellow are Volume, Tone, Pulse Width, Fuzz and Relax/Push. The Pulse Width knob allows you to change the wave form from square wave to narrow pulse waves and everything in between. The Relax/Push knob adds source impedance to the signal that ...