What tubes does the Kalamazoo KEA use?

The Kalamazoo KEA uses 1× 6SJ7 preamp tubes and 2× 6V6 power tubes.

When was the Kalamazoo KEA produced?

The Kalamazoo KEA was produced 1948–1952.

Kalamazoo KEA preset

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

The Kalamazoo KEA is a budget amp built by Gibson under the Kalamazoo name from 1948 to 1952. Two inputs feed a 6SJ7 pentode and a volume control, which drives one 6V6 directly; the second 6V6 is driven through their shared cathode resistor, a self-splitting push-pull pair with no separate inverter. A 5Y3GT and choke supply about 10 watts into a 10-inch speaker. No tone control or feedback: warm, fat, gritty at full volume.

Years produced: 1948–1952
Made in: USA
Wattage: 10W
Channels: 1
Preamp tubes: 1× 6SJ7
Power tubes: 2× 6V6

Tags: american, vintage, 6v6, low-wattage, breakup.

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.