The M291 Dyna Comp® Mini Compressor is the MXR by Jim Dunlop home compressor that combines classic sound and convenience, in a format that is almost half the size of the original. It features a new Attack switch that allows you to adjust the speed of the attack.

This pedal can be powered with the Dunlop ECB003 9 volt adapter or with an external power supply such as the DC Brick, Iso-Brick or Mini Iso-Brick (not included). It cannot be powered by a battery.