Fender Pro Amp 6G5-A - Vibrato preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 6G5-A is a revision of the early-1960s brownface Pro Amp, a 1×15 combo. Normal and Vibrato channels each have two inputs, Volume, Treble and Bass. Two 12AX7s run the harmonic vibrato, generating the LFO and splitting the signal into high and low bands modulated against each other, with Speed and Intensity. A Presence control and a 7025 long-tail phase inverter drive two fixed-bias 5881s on a silicon rectifier, with a standby switch.

• Made in: USA
• Wattage: 40W
• Channels: 2
• Preamp tubes: 4× 7025, 2× 12AX7
• Power tubes: 2× 5881

Tags: american, vintage, brownface, vibrato, 6l6, clean, two-channel.

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.