What tubes does the Fender Bassman 6G6 - Normal use?

The Fender Bassman 6G6 - Normal uses 4× 7025 preamp tubes and 2× 5881 power tubes.

When was the Fender Bassman 6G6 - Normal produced?

The Fender Bassman 6G6 - Normal was produced 1961.

Fender Bassman 6G6 - Normal preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 6G6 is the early-1960s brownface-era Bassman head, the first piggyback Bassman. Bass and Normal channels each have bass, treble and volume and share a presence control. Four 7025s feed a long-tail phase inverter and two 5881s on a GZ34 rectifier. Built for bass, it also became a favorite for warm, full clean-to-crunch guitar tones.

Years produced: 1961
Made in: USA
Channels: 2
Preamp tubes: 4× 7025
Power tubes: 2× 5881

Tags: american, vintage, brownface, bass, 6l6, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.