Supro 1600B preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro 1600B is the Supreme on Valco's 510-1-B chassis, an early-1950s revision of the 1600. Three instrument inputs mix into a 6J7 pentode first stage, then volume and tone controls ahead of a 6SC7 that serves as second gain stage and paraphase inverter. A cathode-biased push-pull pair of 6V6Gs drives a field-coil speaker whose 1K field winding doubles as the filter choke, on a 5Y3GT rectifier. No negative feedback.

• Made in: USA
• Wattage: 10W
• Channels: 1
• Preamp tubes: 1× 6J7, 1× 6SC7
• Power tubes: 2× 6V6GT

Tags: american, vintage, 6v6.

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.