What tubes does the Fender Showman Ab673 Dual use?

The Fender Showman Ab673 Dual uses 4× 12AX7, 1× 12AT7 preamp tubes and 4× 6L6 power tubes.

When was the Fender Showman Ab673 Dual produced?

The Fender Showman Ab673 Dual was produced 1973–1978.

Fender Showman Ab673 Dual preset

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

The Dual Showman AB673 is a high-powered silverface head running 100 watts through four 6L6 output tubes. Designed for the most demanding professional use, it provides massive clean headroom in the Dual Showman tradition.

Years produced: 1973–1978
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 4× 12AX7, 1× 12AT7
Power tubes: 4× 6L6

Tags: american, clean, silverface, high-wattage, 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.