What tubes does the Fender Twin Ab568 use?

The Fender Twin Ab568 uses 4× 12AX7, 1× 12AT7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Twin Ab568 produced?

The Fender Twin Ab568 was produced 1967–1968.

Fender Twin Ab568 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Fender Twin Reverb AB568 is a transitional model between the blackface AB763 and the silverface era, retaining the black cosmetics but with a revised circuit introducing a modified driver stage. It delivers approximately 100W through four 6L6 tubes into two 12" speakers with spring reverb and vibrato. The AB568 is considered tonally close to the blackface originals while foreshadowing the silverface changes to come.

Years produced: 1967–1968
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 4× 12AX7, 1× 12AT7
Power tubes: 4× 6L6

Tags: american, clean, 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.