What tubes does the Fender Proreverb Ab668 use?

The Fender Proreverb Ab668 uses 5× 12AX7 preamp tubes and 2× 6L6GC power tubes.

When was the Fender Proreverb Ab668 produced?

The Fender Proreverb Ab668 was produced 1967–1968.

Fender Proreverb Ab668 preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Fender Pro Reverb AB668 is an early transitional variant bridging the blackface and silverface eras, carrying the AB circuit designation into the cosmetically updated 1967–1968 production period. Like other AB-revision circuits, it is tonally very close to the late blackface designs while beginning the silverface cosmetic transition. The 45-watt 6L6 power section and long-tank spring reverb provide the full Pro Reverb experience. Players who find correctly specced early silverface amps often report tones indistinguishable from pure blackface examples. This is the schematic for the AB668 Pro Reverb.

Years produced: 1967–1968
Made in: USA
Wattage: 45W
Channels: 2
Preamp tubes: 5× 12AX7
Power tubes: 2× 6L6GC

Tags: american, 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.