What tubes does the Fender Bassman 59 Rev A use?

The Fender Bassman 59 Rev A uses 3× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Bassman 59 Rev A produced?

The Fender Bassman 59 Rev A was produced 1959.

Fender Bassman 59 Rev A preset

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

The Bassman 59 Rev A is a documented circuit revision of the tweed Bassman 5F6-A. Sharing the same four-6L6 layout and 4×10 open-back design, minor component changes differentiate this from other revisions while preserving the fundamental character of the most influential tweed amp.

Years produced: 1959
Made in: USA
Wattage: 45W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6L6

Tags: american, tweed, vintage, breakup, influential.

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.