What tubes does the Supro S6625 - Guitar use?

The Supro S6625 - Guitar uses 2× 12AX7 preamp tubes and 2× 6973 power tubes.

When was the Supro S6625 - Guitar produced?

The Supro S6625 - Guitar was produced 1962–1968.

Supro S6625 - Guitar preset

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

The Supro S6625 is a mid-range guitar combo from Valco's Supro lineup, offering two channels for clean and slightly overdriven tones with the characteristic American brightness and raw character the brand is known for. The 6973 output tubes provide a distinctive compression and harmonic profile that differs from the more common 6V6 and 6L6 designs. Supro amps of this type were widely used by working musicians throughout the 1960s.

Years produced: 1962–1968
Made in: USA
Wattage: 14W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6973

Tags: american, vintage.

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.