What tubes does the Valco Supro S6622 use?

The Valco Supro S6622 uses 2× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Valco Supro S6622 produced?

The Valco Supro S6622 was produced 1963–1967.

Valco Supro S6622 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro S6622 was a higher-powered S-series Supro combo, likely running 6L6 output valves for greater headroom and a broader, fuller low-frequency response than the 6V6-based smaller models. Its circuit maintained the Supro character—bright, forward, with natural break-up—but at a scale suited to mid-size venues. The S6622 occupied the upper-mid tier of Valco's Supro product line.

Years produced: 1963–1967
Made in: USA
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6L6

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.