For years, the Dunlop Tremolo was the staple stereo tremolo on the market, essentially the boutique tremolo of its day. It has been absent from the market for a bit, but Dunlop has upped its game with the new MXR Tremolo pedal. In a much more compact box to keep up with the times, this tremolo has six modes: MXR, Bias, Revo, Opto, Square and Harmonic tremolo. The signal path is a mono path, and there is a control in that can accept either tap pedal or expression pedal.