Ampeg Reverberocket II GSC-12-R preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg Reverberocket II GSC-12-R is a single-channel guitar combo with bass, treble and volume plus footswitchable reverb and tremolo. 12AX7 stages and a 6U10 compactron feed a pair of 7591s off a solid-state rectifier.

• Made in: USA
• Wattage: 18W
• Channels: 1
• Preamp tubes: 3× 12AX7, 1× 6U10
• Power tubes: 2× 7591

Tags: american, vintage, reverb, tremolo, mid-wattage.

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.