Oliver B-122 - Channel 2 preset

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

The Oliver B-122 was a professional solid-state bass amplifier from the early 1970s American market, closely related to the B-120. It provided clean, high-power output for bass guitarists demanding reliability and consistent tone at large-venue volumes.

• Years produced: 1970–1978
• Made in: USA
• Wattage: 120W
• Channels: 2

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