JMF Audio Spectra 30-T / 60-T / 120-T / 212-T - Lead preset

Close · 70/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The JMF Spectra series (30-T, 60-T, 120-T and 212-T) shares one early-1980s circuit at different power levels. Channel 1 is a clean channel with Thick and Bright switches, and Channel 2 is a lead channel with its own gain and master; a 12AX7 preamp with FET switching feeds treble, middle, bass and presence controls, op-amp-driven spring reverb and an effects loop. Fixed-bias push-pull 6L6s (two or four depending on the model) power the output.

Tags: reverb, 6l6, crunch, 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.