What tubes does the Ampeg R-12R / R-12RA / R-212RA - Dirty use?

The Ampeg R-12R / R-12RA / R-212RA - Dirty uses 3× 12AX7 preamp tubes and 2× 6V6GT power tubes.

When was the Ampeg R-12R / R-12RA / R-212RA - Dirty produced?

The Ampeg R-12R / R-12RA / R-212RA - Dirty was produced 1963–1967.

Ampeg R-12R / R-12RA / R-212RA - Dirty preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This schematic covers multiple variants of the Ampeg Rocket 12 reverb series, including the R-12R (A) and (B), R-12RA, and the R-212RA with dual 12-inch speakers. All models shared the fundamental Rocket circuit topology using 6V6 output tubes and 12AX7 preamp tubes, with a spring reverb tank added to the reverb-equipped variants. The R-212RA variant stepped up to a 2×12 speaker configuration for increased volume and bass response while retaining the warm, chimey character of the 6V6 output stage.

Years produced: 1963–1967
Made in: USA
Wattage: 18W
Channels: 2
Preamp tubes: 3× 12AX7
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.