Ampeg Reverb Rocket Model R-12-R (5Y3 Rectifier / 6V6 Output Version) preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg Reverb Rocket R-12R was a tube combo guitar amplifier from the mid-1960s featuring a single 12-inch speaker and a spring reverb circuit. Producing around 18 watts from a pair of 6V6GT power tubes, the R-12R delivered warm, slightly compressed tones well-suited to blues, country, and early rock and roll playing. The reverb circuit used a dedicated 12AU7 driver tube to achieve lush, hall-like ambience.

• Years produced: 1963–1967
• Made in: USA
• Wattage: 18W
• Channels: 2
• Preamp tubes: 3× 12AX7, 1× 12AU7
• Power tubes: 2× 6V6GT

Tags: american.

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.