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    ZVEX Effects Woolly Mammoth Vexter Series Bass Fuzz FX Pedal

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    The Z.vex Effects Woolly Mammoth is designed and built for bass, but absolutely kills it on guitar too.  A fuzz pedal that holds onto the lowest of the lows like no other fuzz pedal out there.  It also packs a feature rich EQ, and a noise gate to silence your instrument between notes and phases.

    This is the Vexter Series version of ZVEX Effects super popular Woolly Mammoth, which features silk screened artwork rather than hand painted.  The Vexter Woolly Mammoth is same beast, but housed in a new more affordable box.

    ZVEX Effects are one of the original and best known boutique pedal brands out there, setting the benchmark with their beautifully designed and ultra creative range of FX pedals.


    The Details
    • Effect: Bass Fuzz
    • Assembled In the USA
    • Designed for bass but great on guitar
    • Part of the Vexter 'affordable' series
    • Silk screen artwork
    • Totally kills it on bass!
    • Huge low end
    • Searing mids
    • EQ settings
    • Noise gate
    • 9VDC power center negative
    • 1 year manufacturer warranty


    • Free UK shipping from orders of £200 or more
    • Orders despatched within 1-2 working days
    • Always tracked worldwide shipping
    • Plastic free packaging as standard


    30 day peace of mind return policy, but please read our terms and conditions, returns and refunds policy before placing an order. 

    What Do ZVEX Effects Say?

    Sensitive and touchy, this bass fuzz has tremendous bottom end and a beautiful harmonic structure that
    sounds blistering with a guitar too.

    Designed for bass, a favourite for guitar, this incredibly sub frequency-preserving unit will hold on to the lowest lows like no fuzz ever heard before. It features a gentle gate for silencing your instrument between notes or phrases, and has an EQ control that smoothly selects between more bass and more treble.

    Oh! And the circut 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.


    Designed for smooth repeatable level settings.

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

    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.

    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 circut 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.