T-Rex Engineering Møller 2 OverdriveNAMED AFTER DANISH GUITARIST KNUD MLLER T Rex Mller 2 delivers the same classic overdrive that made it's predecessor one of T Rexs most sought after pedals. Named after Danish guitarist Knud Mller, for whom the original pedal was designed, Mller 2 features a more durable Bass Boost toggle switch and easier to read control knob graphics. The pedal is armed with a 0 20 db Clean Boost, as well as a Mix control which lets you dial in the perfect balance