A classic for a reason. The OC-2 gives you that warm, analog octave-down tone you can't really replicate with a digital pedal — one octave down, two octaves down, or blend them together with the dry signal. Works best with single notes, tracks well in the mid/high registers with a signature glitchy effect (that can be cool) in the low register, and adds serious low-end weight to any rig.

Built like a tank, as you'd expect from Boss. These have been on pedalboards since 1982 and aren't going anywhere.