Garnet G250D Sessionman - Ultra Brite preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The G250D is a mid-1970s valve head from Garnet's Sessionman series, built in Winnipeg. Channel 1 has two inputs, treble, bass and volume with a bright switch; Channel 2 adds a mids control with its own treble, bass, volume and bright switch, and a pull switch on the rear master. Reverb with a footswitch and a 12AX7 tremolo with intensity and a pull slow-speed switch follow, then a 12AX7 phase splitter drives two 6CA7/EL34s on a silicon supply with a 2.5 H choke.

Tags: canadian, vintage, high-wattage, 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.