Gibson GA-55RVT Ranger - Normal preset

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

The GA-55RVT Ranger is a 1960s Gibson combo with Normal and Reverb channels, two inputs each, with loudness, treble, mid-range and bass controls and a presence switch per channel. The Reverb channel adds spring reverb with a level control, and a photocell tremolo has depth and frequency, both on a foot pedal. A 6EU7 inverter drives fixed-bias push-pull 6L6GCs, with an OA2 regulator and solid-state rectifier, into four 10-inch speakers.

• Made in: USA
• Channels: 2
• Preamp tubes: 4× 6EU7, 1× 12AU7, 1× 6FQ7
• Power tubes: 2× 6L6GC

Tags: american, vintage, clean, reverb, tremolo, 6l6.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.