FBT 1200 R - Channel 1 preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The FBT 1200 R is an Italian tube amp dated 1969 on its drawing, with two channels, reverb and tremolo. Each channel has two inputs, an ECC83 with treble, bass and volume controls and a bright switch. An ECC82 gain stage and split-load phase inverter drives four EL503 output tubes in push-pull with fixed bias, from a silicon diode supply with a choke. The spring reverb uses half an ECC83 and an ECL82 driver with half an ECC83 recovering it, and a further ECC83 runs the tremolo with speed and depth controls.

Tags: italian, vintage, reverb, 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.