Fender Showman 6G14-A - Vibrato preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 6G14-A is a revision of the early-1960s blonde Showman head. Normal and Vibrato channels each have two inputs, Volume, Treble and Bass, with no middle control, and there is a Presence control in the feedback loop. Two 12AX7s run the harmonic vibrato, splitting the signal into high and low bands modulated against each other, and a 7025 long-tail phase inverter drives four fixed-bias 5881s from a silicon rectifier for very loud clean power.

Tags: american, vintage, brownface, vibrato, 6l6, high-wattage, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.