“Clyde McCoy was duly paid $500 to endorse a pedal he probably never used”: The wah pedal changed the sound of electric guitar – but was originally intended for the trumpet

Wah Pedal.

In late October 1965, Vox designer Dick Denney visited the Thomas Organ Company, who distributed Vox in the US, to advise on the design of a new line of US manufactured solid-state amplifiers. One of these amps was the 100-watt Vox Super Beatle, which featured a resonant boost.

In a company summary of their work with Denny, it was proposed that a top-panel selector switch could be used to toggle between “the normal maximum treble boost action and the selected resonant boost characteristic”.