Roland Bolt 60 - Normal preset

Close · 65/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Roland Bolt 60 was a solid-state combo amplifier from the early 1980s featuring Roland's advanced transistor circuitry. It offered clean and lead channels with onboard effects, targeting the gigging guitarist market of the era.

Tags: solid-state, modern, 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.