Ampeg Reverberocket R-12-R-B preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1966 Ampeg Reverberocket R-12-R-B is a single-channel guitar combo with volume, tone, tremolo and a built-in echo (reverb) unit with Dimension control. 6SL7 and 6SN7 stages drive a pair of 7591As off a solid-state rectifier into a 12-inch Jensen.

• Made in: USA
• Wattage: 18W
• Channels: 1
• Preamp tubes: 3× 6SL7, 1× 6SN7
• Power tubes: 2× 7591A

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.