Guild Thunderbird Superstar - Normal preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Thunderbird Superstar is a Guild amp built as separate preamp and power chassis, drawn in 1968. Normal and Tremolo-Reverb channels, two inputs each, have their own volume, bass and treble on 12AX7 stages. A 6GW8 drives and recovers the spring reverb, and a 12AX7 oscillator runs an optical tremolo with speed and depth. In the power chassis a 7247 gain stage and split-load inverter drive a fixed-bias push-pull pair of 6L6GCs.

• Made in: USA
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× 12AX7, 1× 6GW8, 1× 7247
• Power tubes: 2× 6L6GC

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

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.