ZVEX Vexter Box Of Rock NEW Distortion / Boost This Box of Rock simulates Zachary’s favorite amp turned up all the way, a 1966 Marshall JTM45. The tone control adjusts brightness and there’s a high-headroom low-noise boost. The Box of Rock is ZVEX Effects' first "distortion" pedal, highly specialized to simulate the "everything on 10" sound of a classic Marshall JTM45 non-master-volume amplifier. Two effects in one box: a clean boost and a distortion circuit. • MFSKU ZV-VR-BOR • UPC 855245003091