What tubes does the Fender Bassman SF - Main use?

The Fender Bassman SF - Main uses 3× 12AX7, 1× 12AT7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Bassman SF - Main produced?

The Fender Bassman SF - Main was produced 1968–1982.

Fender Bassman SF - Main preset

Close · 77/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The silverface Bassman is the CBS-era continuation of the legendary Bassman line, updated with silverface cosmetics and revised biasing. Running four 6L6 output tubes, it maintains the tight, punchy character of the blackface Bassman while reflecting the circuit changes of the CBS period.

Years produced: 1968–1982
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 3× 12AX7, 1× 12AT7
Power tubes: 4× 6L6

Tags: american, clean, silverface, 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.