Supro Supreme (1950) preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1950 Supro Supreme is a simple push-pull Valco amp: two inputs into a 6J7 pentode with volume, then a 6SC7 gain stage and paraphase inverter driving a pair of cathode-biased 6V6s with no negative feedback and no tone control. A 5Y3 rectifies, and the field-coil speaker doubles as the filter choke.

• Made in: USA
• Wattage: 12W
• Channels: 1
• Preamp tubes: 1× 6J7, 1× 6SC7
• Power tubes: 2× 6V6

Tags: american, vintage, 6v6, low-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.