Ampeg R-12-R-B Reverberocket (1966) - Normal preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The R-12-R-B Reverberocket from 1966 uses 7591A output tubes with the B revision designation indicating circuit updates. The Normal channel delivers warm reverb-equipped guitar tone. This version's 7591A tubes provide the characteristic Ampeg midrange focus with the lush spring reverb that made the Reverberocket so popular.

• Years produced: 1966–1969
• Made in: USA
• Wattage: 18W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 7591A

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.