Fender Concert AB763 - Vibrato preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AB763 Concert is the blackface Concert, a 4×10 combo with Normal and Vibrato channels and optical vibrato, but no reverb. A pair of 6L6GCs gives about 40 watts of bright, articulate clean tone. It was dropped in the mid-1960s, overshadowed by the Super Reverb.

• Made in: USA
• Wattage: 40W
• Channels: 2
• Preamp tubes: 2× 7025, 1× 12AX7, 1× 12AT7
• Power tubes: 2× 6L6GC

Tags: american, vintage, blackface, vibrato, 6l6, 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.