Supro 1948 preset

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

A 1948 Valco-built Supro amp with two inputs and a single volume control: a 6SL7 preamp/driver feeds a push-pull pair of 6V6s on a 5Y3 rectifier, for roughly 10 watts.

• Made in: USA
• Wattage: 10W
• Channels: 1
• Preamp tubes: 1× 6SL7
• 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.