Randall RT2/50 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Randall RT2/50 is a two-sided all-tube power amplifier rather than a complete guitar amp. A 12AX7 input stage, with optocoupler-controlled level paths and level pots for each side, feeds two independent 12AX7 long-tail phase inverters. Each inverter drives its own push-pull pair of EL34s into a separate output transformer, giving two 50-watt power sections for stereo or dual-amp use behind a preamp.

• Made in: USA
• Wattage: 50W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 4× EL34

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.