BOSS OS-2 Overdrive / Distortion,BOSS OS-2 Overdrive and Distortion Effects Unit Owner's Manual,Boss OS-2 Overdrive Distortion Bitesize Review - 30 Days, 30 Pedals - WIN! - YouTube,What's the consensus on the boss OS 2? I bought one off eBay and the color knob doesn't work so I'm returning it. The color knob is supposed to blend the overdrive/distortion.. ,BOSS OS-2 Overdrive & Saturation [ sound check ] Power chords & Heavy tone !