What tubes does the Music Man Gp3 use?

The Music Man Gp3 uses 3× 12AX7 preamp tubes.

When was the Music Man Gp3 produced?

The Music Man Gp3 was produced 1974–1978.

Music Man Gp3 preset

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

The Music Man GP-3 was a guitar head featuring a three-tube preamp and a solid-state power section, combining the warmth of tubes with the reliability of transistors. It produced clean, articulate American tones with excellent note separation, typical of the Leo Fender-influenced design approach.

Years produced: 1974–1978
Made in: US
Wattage: 65W
Channels: 2
Preamp tubes: 3× 12AX7

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.