Guild Masteramp (1959) - Normal preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1959 Masteramp is an early Guild amp with Normal and Bright channels, two inputs each, each on its own 12AX7A with paralleled triodes and its own volume control, mixed into shared bass and treble. A 12AX7A long-tail phase inverter drives a cathode-biased push-pull pair of 6L6s on a 5AR4 rectifier with standby, into an 8-ohm speaker. A valve tremolo has rate and intensity controls and a footswitch.

• Made in: USA
• Wattage: 30W
• Channels: 2
• Power tubes: 2× 6L6

Tags: american, vintage, clean, tremolo, 6l6, 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.