The fOXX Wa & Volume Machine is a 1970s fOXX-branded treadle pedal produced by Ridinger & Associates, Inc. Built with the brand’s unmistakable period character, it combines two foot-controlled functions in a single enclosure: Wa and Volume.

Function Selection
The pedal switches between Wa and Volume operation using its function selector control. The treadle is shared between both modes, serving a different purpose depending on the selected function.

In Wa mode, the treadle sweeps the wah circuit, creating the vocal-style filter movement associated with classic 1970s wah pedals. In Volume mode, the same treadle controls the output level, allowing for volume swells, fade-ins, fade-outs, and general signal-level control.

Wa Function
The Wa function is one of the pedal’s defining features. Rather than offering a single fixed wah voice, the fOXX design includes four selectable resonance settings, giving the pedal a broader tonal range and a more unusual control layout than many standard wah pedals of the era.

The selectable resonance settings are:

• Brite
• Mellow
• Funky
• Mellow Plus

These settings alter the response and character of the Wa effect, ranging from sharper and more cutting to smoother, rounder, and more vocal-like textures. This selectable voicing system gives the pedal much of its personality and helps distinguish it as a more flexible and visually distinctive 1970s treadle design.

Volume Function

In Volume mode, the treadle operates as a foot-controlled volume pedal. Moving the treadle adjusts the output level, making it useful for controlled swells, gradual fade-ins, fade-outs, and hands-free level adjustment while playing.

Condition
This fOXX Wa & Volume Machine is in very good condition for its age, showing the kind of cosmetic character expected from a surviving 1970s pedal. The electronics are clean and fully functional, with both the Wa and Volume functions operating as intended.

As with any vintage piece, the photos should be reviewed closely for the most accurate representation of cosmetic condition, surface wear, enclosure covering, hardware, and overall presentation.

Summary
The fOXX Wa & Volume Machine is a distinctive 1970s wah/volume treadle pedal with switchable operation, four selectable Wa resonance settings, and the fuzzy/flocked enclosure covering associated with the fOXX brand. Its most notable characteristics are the combined Wa and Volume functions, the frequency/resonance selector, and the bold visual identity that makes these pedals immediately recognizable among vintage effects collectors.