Marshall Jtm60 60W Jtm600 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Marshall JTM60 (model JTM600 as a combo) is a 60W two-channel valve amplifier from Marshall's mid-1990s revival of the JTM branding. Sharing its lineage in name with the 1962 originals but built around a thoroughly modern two-channel layout, the JTM60 offered clean and gain channels with independent EQ and effects loops, catering to the era's demand for channel-switching versatility in a mid-wattage package. Its EL34 power section provides the familiar British articulation and breakup character, making it a practical choice for gigging musicians who wanted Marshall tone with modern convenience.

Tags: british, crunch.

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.