Oliver G150R / G200R - Channel 2 preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Oliver G150R and G200R were professional solid-state guitar amplifiers offering high output power and onboard reverb for the demanding gigging guitarist. Built in the USA during the transistor-amp boom of the early 1970s, they emphasized reliability and consistent clean performance.

• Years produced: 1972–1978
• Made in: USA
• Wattage: 150W
• Channels: 2

Tags: american, solid-state, vintage, clean.

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.