Supro 1947 preset

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

A 1947 Valco-built Supro practice amp: a 6SL7 dual-triode preamp with volume only (no tone control) into one 6V6 in single-ended class A, with a 5Y3GT rectifier and choke filtering.

• Made in: USA
• Wattage: 4W
• Channels: 1
• Preamp tubes: 1× 6SL7
• Power tubes: 1× 6V6

Tags: american, vintage, 6v6, class-a, 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.