Ampeg Gemini VI GV-15 - Channel 1 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1969 Ampeg Gemini VI GV-15 is a two-channel tube guitar combo. Each channel has bright and normal inputs, volume, bass and treble, and Ultra Hi and Ultra Lo switches. A 6CG7 drives the built-in echo (reverb) unit with a Dimension control and footswitch, and a 12AX7 vibrato/tremolo with speed, intensity and an After-Beat switch has its own footswitch. A 7199 phase inverter feeds a pair of 6L6GCs off a solid-state rectifier, with an external amp jack.

• Made in: USA
• Channels: 2
• Preamp tubes: 4× 12AX7, 1× 6CG7, 1× 7199
• Power tubes: 2× 6L6GC

Tags: american, vintage, 6l6, reverb, vibrato, two-channel.

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.