Gibson Les Paul Jr GA-5 Later - Normal preset

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

The Gibson Les Paul Jr. GA-5 (later version) was the companion amp to the popular Les Paul Junior guitar, designed to offer an affordable complete guitar and amp package. The later circuit revision brought improved reliability while maintaining the warm, harmonically rich single-ended character.

• Years produced: 1954–1960
• Made in: US
• Wattage: 4W
• Channels: 1
• Preamp tubes: 1× 12AX7
• Power tubes: 1× 6V6

Tags: american, vintage, 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.