Ampeg Gemini II G-15 - Channel 2 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Gemini II G-15 is a 15-inch speaker guitar combo from Ampeg's Gemini series. Channel 1 provides the standard input into the warm 6L6 circuit. The Gemini II was one of Ampeg's more popular guitar combos of the mid-1960s, offering a richer, fuller tone than its 12-inch counterparts due to the larger speaker.

Tags: guitar, american, vintage, low-wattage, 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.