Supro 6650TR - Channel 2 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro 6650TR is a two-channel Valco-built combo with reverb and tremolo. Each channel has Treble and Bass input jacks into its own 12AX7 stage and its own Volume. A 12AX7 drives a transformer-coupled spring reverb, recovered by a further 12AX7 with a Tone control and footswitch; another 12AX7 runs the tremolo with Speed, Intensity and footswitch. A 12AX7 phase inverter drives two 6973s with a shared cathode resistor into a pair of 10-inch speakers, from a 5U4GT rectifier with standby.

• Made in: USA
• Wattage: 20W
• Channels: 2
• Preamp tubes: 5× 12AX7
• Power tubes: 2× 6973

Tags: american, vintage, two-channel.

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.