The Tremulator (Early version of TRM-1 Tremulator)

TREMOLO

BOOSTER

The Demeter Amplification Tremulator in the small enclosure with red knobs is a rare, early version of the iconic optical tremolo pedal designed to emulate the classic Fender amp tremolo sound. Housed in a compact “bottom screw” box with distinctive red knobs and “The Tremulator” script on the face, it features simple controls for Depth and Speed, a footswitch, and an LED indicator. The pedal includes an internal trim pot for adjusting the bias of the optical circuit (accessible by removing the bottom plate), offers a slight clean boost, and runs on 9V power via a 1/8" mini plug rather than a standard barrel connector. Known for its warm, pulsing tremolo and legendary reliability, this version is prized by collectors and musicians for its vintage build and classic tone. The main differences between the small enclosure, red knob Demeter Tremulator and the standard TRM-1 Tremulator are cosmetic and related to production era: the early version is smaller, features red knobs, and is more collectible, while the TRM-1 is larger, uses black knobs, and is more widely available. Both share the same optical tremolo circuit and controls, so their sound and performance are virtually identical. Any minor tonal variation would be due to component age rather than design.