Ampeg GSC-12R Reverberocket II - Normal preset

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

The GSC-12R Reverberocket II is a second-series Reverberocket with revised circuit and updated cosmetics. The Normal channel delivers clean 6L6 tone with spring reverb. The C designation in GSC indicates a specific cabinet or circuit update distinguishing it from the standard GS-12R.

• Years produced: 1966–1970
• Made in: USA
• Wattage: 22W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6L6

Tags: guitar, american, vintage, low-wattage, reverb, clean.

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.