This Box of Rock simulates Zacharys favorite amp turned up all the way, a 1966 Marshall JTM45. The tone control adjusts brightness and theres a high-headroom low-noise boost. The Box of Rock is Z.Vex Effects first "distortion" pedal, highly specialized to simulate the "everything on 10"sound of a classic Marshall JTM45 non-master-volume amplifier. You may use the Box of Rock effectively with many different amplifiers. Once youve set your maximum needed drive on the pedal, use your guitars 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 will notice the words "distortron engine" on the Vexter version of this pedal (no, thats not a misprint) on the pedal.