Boss MZ-2 Digital Metalizer
The Boss MZ-2 Digital Metalizer combines an analog distortion circuit with a digital chorus chip to create all the 80's hair metal you could ever need.
The Level knob controls the volume, the Tone knob controls the high/low shift and the Drive knob controls the gain of the distortion. The 6 way Mode selector switches between presets including Single, Doubling and Chorus modes.
Produced from December 1987 until August 1992.
What's different about the MZ-2 is that it features stereo outputs. While this may seem strange for a distortion, it's more for the doubling and chorus effects to create a wall of sound through multiple amps.