Constellation OD

The Constellation OD is built around the ProCo Rat structure, reworked with asymmetric clipping to favor odd harmonics and a lower-gain, more open response than the original. It covers edge-of-breakup to mid-gain drive and is voiced to push an amp already sitting on the edge into natural saturation. Running it on anything from 9 to 18 volts trades compression for headroom, so the higher supply gives a tighter, louder, more amp-like feel. When switched off it leaves a clean buffer in the signal path to drive long cable runs and preserve high end across a board. It's one of Collateral's more flexible single overdrives.