Garnet GS100R Jammer preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GS100R Jammer is a 1983 Garnet head with an overdrive preamp. A 12AX7 input stage with a drive control feeds a second 12AX7 stage, treble, bass and a midrange control, then volume and a footswitchable solo level boost into a third gain stage. A 12AU7 drives the spring reverb with a 12AX7 recovery and a footswitch. A 12AX7 long-tail inverter with a preset presence and, on some models, a master volume drives two fixed-bias 6L6GCs.

• Made in: Canada
• Channels: 1
• Preamp tubes: 3× 12AX7, 1× 12AU7
• Power tubes: 2× 6L6GC

Tags: canadian, vintage, crunch, reverb, 6l6.

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.