This thing is an absolute beast which is what i'd expect with it having one hell of a beast of a bass players name on it. From Subtle overdrive tones to rip your face off distortion tones the EBS Billy Sheehan Deluxe Drive is something to behold. With a basic setup of Drive, Tone, Level and Clean, you can shape your tone to however you see fit. The clean knob (arguably the most important thing on this pedal) allows you to blend your wet and dry signals to still retain low-end while having the distortion kicked on. There is an on-board compression which is really usable with a trim pot inside to set the threshold of the compression. There are 3 positions for the compression and that is Off, Mid and High. Off is pretty self explanatory, Mid adds a medium sized amount of compression (which I feel to be the perfect sweet spot when playing live) and High adds a lot of compression for when you really need it. There is also a phase switch which allows you to set it from normal to inversion which is really ideal for live shows as the normal position really gives you that Billy Sheehan "Pissed Off Mid-range" tone to coin a term from Legend Jon Willis. There is also a boost function which boosts the drive for even more gain! with a trim pot inside to set the level of the boost. What sets this aside from other drive pedals is that it has a swap-able op-amp which allows you to really have your own signature tone. This can be powered by a 9v battery or a 9V DC power supply.