What tubes does the Supro S6616 - Normal use?

The Supro S6616 - Normal uses 1× 12AX7 preamp tubes and 1× 6973 power tubes.

When was the Supro S6616 - Normal produced?

The Supro S6616 - Normal was produced 1962–1968.

Supro S6616 - Normal preset

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

The Supro S6616 is a compact single-channel combo from Valco, offering the essential Supro character in a straightforward student-to-intermediate amplifier package. Despite its modest power rating, the 6973 output tube and Valco's circuit design give it the raw, harmonically textured tone that defines the Supro sound. This model was widely sold through catalog retailers in the mid-1960s.

Years produced: 1962–1968
Made in: USA
Wattage: 7W
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.