What tubes does the Garnet G250D Sessionman use?

The Garnet G250D Sessionman uses 3× 12AX7 preamp tubes.

When was the Garnet G250D Sessionman produced?

The Garnet G250D Sessionman was produced 1972–1980.

Garnet G250D Sessionman preset

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

The Garnet G250D Sessionman is a high-powered amplifier from the Sessionman series, designed for the studio and larger venues where consistent, reliable tone was paramount. The Sessionman line was Garnet's answer to the professional market segment, offering more power and features than the Rebel series.

Years produced: 1972–1980
Made in: Canada
Wattage: 250W
Channels: 2
Preamp tubes: 3× 12AX7

Tags: vintage, clean, american.

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.