1981 Inventions DRV Overdrive No3 Overdrive Effect PedalClean, cut, ready for action. As 1981 Inventions' premier creation, the DRV is an impressive pedal. Tonally and aesthetically, the DRV sets itself apart from the pack fairly quickly. Its signal warming and breakup inducing capabilities separate it from your everyday drive pedal. Two internal circuits a distortion and a preamp boost combine to make for an incredibly nuanced and flexible drive unit. The DRV is highly interactive with its three dials.