What tubes does the Music Man Music Man Gp 3A use?

The Music Man Music Man Gp 3A uses 3× 12AX7 preamp tubes.

When was the Music Man Music Man Gp 3A produced?

The Music Man Music Man Gp 3A was produced 1976–1982.

Music Man Music Man Gp 3A preset

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

The Music Man GP-3A was a guitar head featuring three 12AX7 preamp tubes for enhanced harmonic warmth and tone shaping. It represented Music Man's more sophisticated approach to preamp design, influenced by Leo Fender's ongoing involvement with the company.

Years produced: 1976–1982
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.