BOSS GP-20 Amp Factory.

BOSS GP-20 Amp Factory.

Guitar / bass effect pedal.

Good Condition.


The GP-20 Amp Factory™ offers a variety of incredible COSM®
Guitar Amp models designed for live performance or recording
—22 in all.

Thanks to its simple knob-based controls, two-channel
operation, and ability to model the best amps ever made,
the brilliant GP-20 is a tonal monster for live or studio applications.