Fender Twin Reverb AC568 - Normal preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AC568 is the 1968 Twin Reverb from the switch between blackface and silverface, very close to the AB763. Normal and Vibrato channels feed tube-driven reverb and vibrato, and four 6L6GCs on a silicon rectifier give about 85 watts of big, clean tone.

• Years produced: 1968
• Made in: USA
• Wattage: 85W
• Channels: 2
• Preamp tubes: 3× 7025, 1× 12AX7, 2× 12AT7
• Power tubes: 4× 6L6GC

Known for: John Lennon, George Harrison.

Heard on: Get Back — The Beatles (1970).

Tags: american, vintage, silverface, reverb, vibrato, 6l6, high-wattage.

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.