What tubes does the Fender 6G12 use?

The Fender 6G12 uses 4× 12AX7, 1× 12AT7 preamp tubes and 4× 6L6 power tubes.

When was the Fender 6G12 produced?

The Fender 6G12 was produced 1961–1963.

Fender 6G12 preset

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

The Concert 6G12 is a brownface-era 4×10 combo delivering 40 watts through four 6L6 output tubes. Part of Fender's transition from the tweed to blackface era, its brownface cosmetics and 6G-series circuit produce warm, slightly rounder tones compared to the later blackface counterparts.

Years produced: 1961–1963
Made in: USA
Wattage: 40W
Channels: 2
Preamp tubes: 4× 12AX7, 1× 12AT7
Power tubes: 4× 6L6

Tags: american, clean, brownface, 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.