The Z.Vex Distortron Guitar Effects Pedal is the gifted little sister to the Z.Vex “Box of Rock”. It is highly specialized to simulate the “everything on 10” sound of a classic Marshall ® JTM45 non-master-volume amplifier. You may use the Distortron™ effectively with many different amplifiers, but to get the sound it was truly designed for, try it through an old-school non-master volume Marshall at least once. You may use your guitar’s volume control to adjust for the exact amount of distortion you need, all the way down to very clean and clear with most drive settings when the gain switch is set to “Lo.”
The main features of the Z.Vex Distortron Guitar Effects Pedal include:
Friedman BE-OD Overdrive
Ibanez TS9 Classic Tubescreamer
Boss BD-2 Blues Driver Pedal 
Marshall Bluesbreaker Re-Issue Pedal
PROCO Rat 2