Yamaha G100 Series III - Channel A preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The G100 Series III is a 1984 solid-state Yamaha guitar combo, rated 100 watts RMS, in 1×12, 2×10 and 2×12 versions. Channel A has Volume, Treble, Middle and Bass with a pull Mid Boost; Channel B has Gain, Master Volume, Treble, Middle and Bass with its own Mid Boost. They share a parametric EQ (Level, Q, Frequency), Presence and an Accutronics spring reverb, with A/B footswitching, an effects loop and direct out.

• Made in: Japan
• Wattage: 100W
• Channels: 2

Tags: japanese, solid-state, reverb, 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.