FBT 150 preset

Close · 68/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The FBT Model 150 is a small Italian tube guitar amp with tremolo. A 12AX7 preamp feeds a single-triode split-load phase inverter, which drives two 6AQ5s in push-pull. A 6X4 rectifies the supply. The tremolo oscillator has a speed control and a footswitch. The controls are simple volume and tone.

• Made in: Italy
• Channels: 1
• Preamp tubes: 2× 12AX7
• Power tubes: 2× 6AQ5

Tags: italian, vintage, clean, tremolo, low-wattage.

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.