What tubes does the Fender Bassman 20 use?

The Fender Bassman 20 uses 2× 12AX7 preamp tubes and 2× 6V6GT power tubes.

When was the Fender Bassman 20 produced?

The Fender Bassman 20 was produced 1982–1985.

Fender Bassman 20 preset

Close · 60/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Fender Bassman 20 is a compact, post-CBS-era combo that applied the Bassman name to a lower-power, student-oriented package. At 20 watts through two 6V6 output tubes, it produces a warm, slightly compressed clean tone reminiscent of the small tweed Fenders of the 1950s. While not as historically significant as the 5F6-A Bassman, the Bassman 20 serves as an accessible studio and practice amplifier with genuine Fender clean character.

Years produced: 1982–1985
Made in: USA
Wattage: 20W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6GT

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.