Matamp GT120 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

A 120-watt head from Matamp, built by Radio Craft in Huddersfield. Two ECC83s handle a switched-voicing preamp and phase inverter, driving four output tubes, and the amp has slave, send and return jacks. Matamp heads of this era are known for loud, heavy, clear British tube tone.

• Made in: UK
• Wattage: 120W
• Channels: 1
• Preamp tubes: 2× ECC83

Tags: british, vintage, high-wattage.

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.