What tubes does the Ampeg SR-212RT use?

The Ampeg SR-212RT uses 3× 12AX7 preamp tubes.

When was the Ampeg SR-212RT produced?

The Ampeg SR-212RT was produced 2002–2010.

Ampeg SR-212RT preset

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

The Ampeg SR-212RT is an all-tube 2x12 guitar combo from 2001, rated 96 watts at 6% distortion. Guitar and accordion inputs feed a 12AX7 preamp with gain, treble, bass, mid, volume and master, and relays switch it between clean and dirty modes from a footswitch. Tremolo with speed and intensity and an op-amp-driven spring reverb with its own level are also footswitchable, and a long-tail phase inverter drives four fixed-bias octal output valves.

Years produced: 2002–2010
Wattage: 100W
Channels: 1
Preamp tubes: 3× 12AX7

Tags: american, reverb, tremolo, high-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.