The Loma Prieta by Coppersound is a harmonic tremolo with 4 selectable waveform shapes (Sine, Square, Ramp Up, Ramp Down). The Shift knob and related footswitch is where the Loma Prieta stands out. Choose between Double, Distortion, LoFi, or Tap modes for dialing in unique cuts to the tremolo sound on the fly depending upon the selected setting. The Grit control dials distortion into the signal, a feature not usually found in tremolo pedals.

An optional expression pedal allows for control of rate on the fly, and an internal DIP switch turns on external tap tempo. A side switch lets you choose between Harmonic  or a more standard tremolo sound.