MXR STEREO TREMOLO M-159

This pedal can operate as a normal mono tremolo pedal but also has stereo operation, which opens up the possibility of using two amps or creating stereo width in recording.

This is accomplished by having both a standard mono input and output plus a separate stereo input and output, each of which use a single 6.4mm TRS jack allowing several mono in/ stereo out and stereo in/stereo out routing possibilities.

Three knobs control the sound: depth and speed are self-explanatory while the shape knob is the one that changes the nature of the type of tremolo you hear as it gradually changes the shape of the waveform.

Fully counter-clockwise you get a sine wave, the centre position gives a trapezoid wave, while fully clockwise dials in a square wave.

As well as the standard effect on/off footswitch there’s a second footswitch that turns the pedal into a stereo panner – it switches the tremolo modulation phase of the stereo channel so the sound alternates between the two outputs.