Through a collaboration with EarthQuaker Devices, the Dr. Z Z-Drive Overdrive brings the overdriven Dr. Z amplifier sound in a convenient pedal. Featuring two different switchable preamp channels (germanium and mofset), each using OPA 2134 op amps, the overall signal first goes through the 3-part EQ section before being affected by the Drive, Level, and Cut controls of the selected channel. This EQ-first signal path means that the sound can be overdriven further by turning the Treble, Middle, and Bass knobs clockwise. Switching between the channels allows for a range of tones between light and open overdrive or compressed high-gain distortion.