Fender Bandmaster AA763 - Vibrato preset

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

The AA763 is an early blackface Bandmaster head without reverb. Normal and Vibrato channels feed a 12AX7 optical vibrato and a 12AT7 long-tail phase inverter, driving two fixed-bias 6L6GCs on a silicon rectifier for about 40 watts. It gives firm, clear blackface clean tones and is usually paired with a 2×12 cabinet.

Tags: american, vintage, blackface, vibrato, 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.