What tubes does the Fender Bassman 6G6C use?

The Fender Bassman 6G6C uses 3× 12AX7 preamp tubes and 2× 6L6GC (plus 1× GZ34 rectifier) power tubes.

When was the Fender Bassman 6G6C produced?

The Fender Bassman 6G6C was produced 1963.

Fender Bassman 6G6C preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Fender Bassman 6G6-C is the final brown-era Bassman designation, bridging the very last brown-era production with the imminent blackface transition. Circuit characteristics closely mirror the 6G6-B, and this variant is extremely rare. The 6G6-C is primarily of historical interest to collectors and engineers tracing the precise evolution of the Bassman circuit through the brown-to-blackface transition.

Years produced: 1963
Made in: USA
Wattage: 40W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6GC (plus 1× GZ34 rectifier)

Tags: american, vintage, clean.

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.