Fulltone Supa-Trem ST-1

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Fulltone Supa-Trem ST-1

2007

The Fulltone Supa-Trem ST-1 optocoupler (photocell) tremolo pedal.
Tremolo is a volume-based modulation effect that rapidly raises and lowers the volume of your guitar signal to create a rhythmic, pulsing sound. By utilizing a photocell circuit, the ST-1 specifically replicates the warm, smooth, and watery amplitude modulation found in historic 1960s American tube amplifiers (like vintage Fender Brownface and Blackface amps).