What tubes does the Fender Twin Reverb AB763 use?

The Fender Twin Reverb AB763 uses 4× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Twin Reverb AB763 produced?

The Fender Twin Reverb AB763 was produced 1963–1985.

Fender Twin Reverb AB763 preset

Close · 62/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Twin Reverb AB763 (Mod 3) is a third modified Twin Reverb schematic reference. The base platform — 85-watt, four-6L6, 2×12, spring reverb, tremolo — remains the legendary Twin Reverb design.

Years produced: 1963–1985
Made in: USA
Wattage: 85W
Channels: 2
Preamp tubes: 4× 12AX7
Power tubes: 4× 6L6

Tags: american, clean, blackface, high-wattage, reverb, vintage.

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.