Mad Professor Snow White Auto Wah PCB Pedal

£199.99

This is a New Mad Professor Snow White Auto Wah PCB Pedal from Mad Professor, listed in Wah & Filter Pedals on Just Pedals. Read More below.

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The SNOW WHITE AUTOWAH (SWAW) circuit is based on a 1991 BJF rack mount remote wah circuit and is tuned like a real wah.

The circuit was redesigned with envelope controls and built into small size pedal.

It has very fast tracking and accuracy rarely found on auto wahs/ envelope filters. With the four knobs you can have total control of the effect.

SWAW works both with guitar and bass and you can fine-tune the pedal to suit your instru-ment, your playing style and your taste of tone.

The pedal has a unique decay control for the filter frequency fall speed. You can set it to be fast for wah effects on every note, or slower for a more traditional auto wah sound.

Controls

  • SENSITIVITY: Sets the filter trigger level, tune this carefully to fit your guitar/bass output and your playing touch. You can further change the sensitivity from your guitar volume knob while playing.
  • BIAS: Controls the filter resonance frequency. When Sensitivity is turned fully off the Bias can be used as a sweepable filter.
  • RESONANCE: Controls the sharpness or Q-factor of the filter.
  • DECAY: Controls how fast the filter frequency falls back to resting point (that is set with the Bias control). This can be set fast (CW) so you get the wah effect on every note or slow for a more traditional auto wah sound.
  • PLAYING: Please take time to get used to the controls and as this is a voltage control filter it will react to your playing touch. The envelope control circuit is carefully designed to follow the dynamics of guitar/bass and it might take some time to master the Auto Wah playing technics. Try also adjusting guitar volume between 8 and 10 to further expand use.

Specifications

  • Supply voltage: 9VDC
  • Current consumption at 9VDC: 15mA
  • Input inpedance: 500K
  • Output impedance: 1K
  • Max input -20dBV
  • Complete bypass (true bypass)

Brand

Mad Professor

Mad Professor crafts boutique pedals with a strong focus on feel, clarity, and musical response. Known for touch-sensitive overdrives, warm modulation, and expressive dynamics, the brand blends vintage-inspired tone with refined modern design. Each circuit is built to enhance your core sound rather than overpower it.

Choose Mad Professor when you want character without compromise. From transparent drive to smooth, organic modulation, their pedals respond beautifully to your playing and sit naturally in the mix — subtle when needed, rich and full when pushed.

Category

Wah & Filter Pedals

Wah and filter pedals emphasise or remove a moving part of the frequency spectrum. A treadle wah sweeps a resonant peak through the signal, while auto-wah, envelope and fixed filters use playing level, an LFO or a set frequency to create vocal, synth-like or cocked-wah textures. Q, sweep range, input loading, bypass type and placement all affect the response. Before gain, the filter determines which frequencies clip; after gain, it shapes the finished distortion. Check whether the circuit expects a direct guitar signal and whether the switch is mechanical, soft-touch or optically controlled.

Tags

Bass

Designed or voiced to retain low-frequency information and headroom with bass guitar or other low-register sources. Controls may centre on clean blend, low-end EQ, compression or drive.