The Zvex Box of Rock is ZVex's first "distortion" pedal, highly specialised to simulate the "everything on 10" sound of a classic Marshall JTM45 non-master-volume amplifier.
You can use the Box of Rock effectively with many different amplifiers, but to get the sound it was designed for, try it through a Marshall at least once.
You can 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.
