Mu-Tron Bi-Phase II
This dual channel overdrive is a faithful clone of the original Klon circuit. The clipping switch lets you choose between Germanium diode clipping for the smooth, compressed sound of the original, Silicon diode clipping for a crunchier, more open sound, or LED clipping for a gritty, completely uncompressed distortion. One of the things this circuit is famous for is its ultra-clean and super transparent boost capabilities. That's a lot of overdrive for $89!!
Excellent condition, fully functional, just the pedal.