Detail 01
Sensitivity
Shapes the effect response.

Independent shopping perspective
A Stuart Zender signature bass filter pedal built for dynamic, choppy auto-wah sounds, with footswitchable wah and 12AX7 valve-driven distortion.


Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Shapes the effect response.
Detail 02
Sets how much effect is heard; with Sensitivity, it ranges from subtle filtering to responsive auto wah.
Detail 03
Footswitchable distortion that enriches harmonics.
Detail 04
Metal casing with premium controls and switches, hand made in Ashdown’s UK Custom Shop.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
It is Stuart Zender’s signature effects pedal. Zender was a founding member and original bass player of Jamiroquai.
Yes. Both the wah effect and 12AX7-powered Valve drive are footswitchable.
18V is recommended. It can run from a 9V supply in limiting situations.
Yes. A side switch selects whether valve overdrive is added pre- or post-wah.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.