What tubes does the Supro S6606 - Normal use?

The Supro S6606 - Normal uses 1× 12AX7 preamp tubes and 1× 6973 power tubes.

When was the Supro S6606 - Normal produced?

The Supro S6606 - Normal was produced 1960–1965.

Supro S6606 - Normal preset

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

The Supro S6606 is an entry-level combo from Valco's Supro range, built for student and practice applications with a simple circuit producing characterful, warm tube tone. The 6973 output tube gives it a distinctive signature even at its modest power level, delivering natural compression and harmonic richness. These small Supro combos have become sought after by recording guitarists who value their raw, intimate tone.

Years produced: 1960–1965
Made in: USA
Wattage: 5W
Channels: 1
Preamp tubes: 1× 12AX7
Power tubes: 1× 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.