Gibson KEA preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The KEA is a simple early Gibson amp of the 1940s with two inputs, a single volume control and no tone control. A 6SJ7 pentode preamp drives a pair of 6V6 output tubes with no separate phase-inverter valve: the second 6V6 has its grid grounded and is driven through the shared cathode resistor, so the pair splits its own phase. A 5Y3GT rectifier supplies the power, with the speaker's field coil serving as the filter choke.

• Made in: USA
• Wattage: 8W
• Channels: 1
• Preamp tubes: 1× 6SJ7
• Power tubes: 2× 6V6

Tags: american, vintage, clean, 6v6.

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.