Peavey Rockmaster - Ultra preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Peavey Rockmaster is a three-channel rack-mount tube preamp (1991) with no power amp. Four 12AX7s give a Clean channel and diode-clipped Crunch and Ultra channels, with per-channel effects loops and Bottom/Body/Edge post-shaping. It was made for rack guitar rigs.

Tags: american, preamp, clean, crunch, high-gain, multi-channel.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.