In PT.1 of this video, Ray plays through a Fender Hot Rod Deluxe and showcases the varieties of voicing the Z-Drive Preamp pedal can achieve through the HRD's no-frills clean channel.
The Z-Drive starts with an active global EQ and gives you a choice between two distinct sounding preamp channels (via the channel footswitch). The germanium channel uses NOS germanium diodes and is a lighter more open sounding overdrive. The mosfet channel is a more compressed, higher gain overdrive. Both gain stages use hi-fi OPA 2134 op amps. Because the signal goes through the EQ first, turning the EQ controls clockwise can increase overall gain/distortion.
With the Z-Drive you essentially get two pedals in one. You can use one channel as a cleaner boost and the second channel for full overdrive or dial in overdrive sounds to bring out the different characteristics of each channel.