Supro S6622 preset

verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro S6622 is a 1960s Valco combo with reverb and tremolo built around a single cathode-biased 6V6 in single-ended class A, driving a 10-inch speaker through a 5Y3 rectifier. Three inputs feed a 12AX7 gain stack with volume and a single tone control; a paralleled 12AX7 drives a spring reverb with its own level and on/off switch, and a fourth 12AX7 runs a phase-shift tremolo with speed control and footswitch. No negative feedback.

• Made in: USA
• Channels: 1
• Preamp tubes: 4× 12AX7
• Power tubes: 1× 6V6

Tags: american, vintage.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.