What tubes does the Fender Bassman 6G6B use?

The Fender Bassman 6G6B uses 3× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Bassman 6G6B produced?

The Fender Bassman 6G6B was produced 1963.

Fender Bassman 6G6B preset

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

The Bassman 6G6B is an alternate schematic designation for the brownface Bassman 6G6-B, the final brownface revision before the blackface era began.

Years produced: 1963
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6L6

Tags: american, clean, brownface, 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.