What tubes does the Valco Supro S6616 use?

The Valco Supro S6616 uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Valco Supro S6616 produced?

The Valco Supro S6616 was produced 1962–1967.

Valco Supro S6616 preset

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

The Supro S6616 was a tremolo-equipped Supro combo from Valco's S-series range, providing the combination of clean American valve tone and pulsating amplitude modulation that made tremolo-equipped Valco amps especially prized for vintage blues and surf playing. Its moderate power output gave it useful clean headroom while remaining responsive enough to break up naturally when pushed. The S6616 represents one of the more feature-complete mid-tier Supro designs.

Years produced: 1962–1967
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.