Sylvia Massy Woolly Mammoth

ZVEX Effects is proud to present the Sylvia Massy Woolly Mammoth—a monstrous fuzz pedal that delivers crushing low end for bassists while also blistering on guitar. This Sylvia Massey special edition release features:

• Hand-selected & tested NOS 2N2222A transistors for unrivaled tone  
• Stunning UV-printed artwork by Sylvia Massy—legendary record producer and artist (Tool, System of a Down, Prince, Queens of the Stone Age, and more)  

In the leftmost position, the waveshape is quite symmetrical which produces a smooth creamy sound. Turning it up slightly introduces lovely intermodulation distortion. Turning it clockwise narrows the waveshape into asymmetrical pulses, making the tone reedier and brassier. This also introduces an unusually smooth ‘gating’ action, which gives you an absolutely eerie silence between notes.

At most settings you will notice that low frequency pressure is preserved. This circuit has a frequency response that continues several octaves below audibility. The subs will knock everything off your amps, so put the bottles on the floor. No kidding.

Oh! And the circuit draws less than one-half of a milliampere (0.0004 amps, typical). That is less than one-hundredth the current consumption of most ‘commercial’ pedals, giving this pedal as high a battery life as you can find anywhere. In fact, if you use an alkaline battery and always unplug the input cord between sessions, you may never have to change it at  all.

In our continuing effort to be friendly towards the earth, the universe and it’s inhabitants; no animals were harmed during the making of this pedal.

OUTPUT: Designed for smooth repeatable level settings.

EQ: Tilts the spectral response, turning to the left adds lows and softens the highs, then mids, and finally reduces lows.

PINCH: The harmonic structure can be controlled with this knob. It adjusts the pulse width of the waveform.

WOOL: Adjusts the amount of fur around the note.