Fender Bassman 6G6-C - Normal preset

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

The 6G6-C is a later revision of the early-1960s piggyback Bassman head. The Bass channel has two inputs and two 7025 stages with bass, volume and treble controls; the Normal channel has a 7025 with treble, bass and volume. A presence control sits in the feedback loop, and a 7025 long-tail inverter drives two fixed-bias 5881s from a silicon diode rectifier into two speakers. It carries the brownface-era Bassman circuit toward the blackface amps that followed.

• Made in: USA
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× 7025
• Power tubes: 2× 5881

Tags: american, vintage, bass, 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.