Supro Dual-Tone 1624T - Channel 1 preset

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

The Supro Dual-Tone 1624T is a Valco-built combo with two inputs sharing one power amp, dual volumes, a single tone control and tremolo with speed, intensity and footswitch. Three 12AX7s feed a push-pull pair of 6973 output tubes on a 5Y3 rectifier.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6973

Tags: american, vintage, tremolo, two-channel, crunch.

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.