The Rocker 15 Terror is the head version of the Rocker 15 combo. It uses a lunchbox-sized steel chassis with a carry handle and an all-valve signal path: a four-stage preamp, a pair of EL84 power valves and a valve-buffered effects loop.

There are two separate preamp channels. Natural is a non-master-volume channel with a single volume control for clean, uncoloured tone. Dirty has gain, bass, middle, treble and volume controls for crunch and heavier saturation. A selector switches between channels, and a half/standby/full power switch sits beside the main power switch.

The output power switch selects 15, 7, 1 or 0.5 watts, so the valves can be driven harder at lower volume for home or recording use. The speaker output supports a single 8 ohm or 16 ohm cabinet, or two 16 ohm cabinets. The effects loop is valve buffered to keep modulation and delay pedals clear. The amp has no menus or modelling.