What tubes does the Valco Supro S6606 use?

The Valco Supro S6606 uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Valco Supro S6606 produced?

The Valco Supro S6606 was produced 1961–1966.

Valco Supro S6606 preset

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

The Supro S6606 was a mid-range Supro combo in Valco's S-series lineup, stepping up from the entry-level models with more power and typically additional controls. Its all-valve circuit produced the warm, immediate American tone that made Supro amps a staple of 1960s blues and rock playing. The S6606 was accessible enough for semi-professionals while offering genuinely musical performance.

Years produced: 1961–1966
Made in: USA
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: american.

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.