The MXR M159 Tremolo keeps all the effects and controls of the original—but in a smaller, pedalboard-friendly size. Its 18-volt operation provides rich and vibrant sound with low noise due to its high headroom. With the versatile input/output options the M-159 can produce hypnotic, pulsing mono tremolo through a single amp or ping-ponged from one amp to another in stereo mode for a huge, spacious tone.