DIY AB763 Lite II preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AB763 Lite II is a follow-up to the no-reverb Deluxe Reverb DIY design, built from the Fender AB763 normal channel. A 12AX7 preamp with treble, bass, a Mid/Raw control in the blackface stack, Volume and bright switch feeds a long-tailed-pair phase inverter and two fixed-bias 6V6s. It adds a choke in the supply and a Marshall-style adjustable bias circuit, with a valve rectifier.

• Channels: 1
• Preamp tubes: 1× 12AX7, 1× 12AT7
• Power tubes: 2× 6V6

Tags: diy, american, blackface, 6v6, 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.