Description: The Zvex Box of Rock is one serious drive pedal, in which a super fat, Marshall-esque drive side teams up with an independent, usable boost to cause some extreme sonic damage. This pedal is Zvex Effect's first "distortion" pedal, highly specialized to simulate the "this amp goes to 11" sound of a classic Marshall JTM45 non-master-volume amplifier. You can use this pedal effectively with many different amplifiers, but to get the sound the engineers at Zvex heard when they designed it, try it through a 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. You'll notice the words "distortron engine" on the Vexter version of this pedal (no, that's not a misprint) on the pedal. In fact, the Zvex Box of Rock isn't just an engine, it's a Hemi.