What tubes does the Fender Bassman AA864 - Normal use?

The Fender Bassman AA864 - Normal uses 3× 7025, 1× 12AT7 preamp tubes and 2× 6L6GC power tubes.

When was the Fender Bassman AA864 - Normal produced?

The Fender Bassman AA864 - Normal was produced 1964–1965.

Fender Bassman AA864 - Normal preset

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

The AA864 is an early blackface Bassman head from the mid-1960s. The Bass Instrument channel has two inputs, treble, bass with a 10K middle-position tap, volume and a Deep switch, and adds a third 7025 gain stage; the Normal channel has treble, bass, volume and a Bright switch. A 12AT7 long-tail inverter drives two fixed-bias 6L6GCs from a silicon diode rectifier. It moved the Bassman from the brownface sound to the brighter, tighter blackface voice.

Years produced: 1964–1965
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 3× 7025, 1× 12AT7
Power tubes: 2× 6L6GC

Tags: american, vintage, blackface, 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.