The perfect way to add a little "movement" to your sound.

Purchased used years ago and barely ever played around with.

In excellent shape, though I'll note three very small (and very hard to photograph) surface scratches on the bottom of the pedal. (They haven't gone through the yellow, so I doubt anyone else will ever notice.) Sticker and foam feet originally included left intact, but easy enough to remove if you please.

More from the Professor on this discontinued pedal!

Mad Professor Mellow Yellow Tremolo is a true sine wave tremolo effect designed for tremolo tones from the of 50′s type soft swing to deep modulation with great playability, regardless of tremolo depth or speed.

The strength of the incoming signal is modulated by a sinusoidal oscillator, just like in the early amps, and modulation bias is set to give symmetrical modulation. This gives a very musical tremolo effect that blend very well with both clean and distorted guitar tones.