Guild G-300 Tamarack preset

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

The G-300 Tamarack is a 1993 solid-state acoustic-instrument amp from Guild's US Music Corp period. A single high-impedance input with an active/passive switch and sensitivity trim feeds op-amp stages with level, treble, middle and bass controls, a switchable feedback notch filter, spring reverb, and a bucket-brigade chorus with speed and depth. After the master volume, two identical LM1875 power amplifiers each drive a speaker.

• Years produced: 1993
• Channels: 1

Tags: solid-state, acoustic, clean, reverb.

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.