Marshall JTM45 Tremolo - Normal preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This is a tremolo version of the JTM45, with an ECC83 tremolo oscillator added to the two-channel Bassman-derived preamp. It uses two KT66s with a GZ34 rectifier; units built with silicon diodes instead were fitted with EL34 output valves.

Tags: british, vintage, tremolo, kt66, mid-wattage, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.