Gibson Atlas Medalist preset

Verified · 89/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Atlas Medalist is a Gibson bass combo from the Medalist line, with a single 15-inch 16-ohm speaker. Two inputs feed a 6EU7 stage, a bass and treble network and a volume, then the second 6EU7 half and a 6C4 gain stage. A 6EU7 long-tail phase inverter drives a fixed-bias pair of 6L6s, powered by a silicon-diode supply with a filter choke and a power/polarity/standby switch.

Tags: american, vintage, bass, 6l6.

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.