FBT BR500 Bassorgan - Bass preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The FBT BR500 Bassorgan is a high-powered 500-watt solid-state amplifier designed for bass guitar and organ performance, with dedicated organ input circuitry. FBT's professional audio background informed the BR500's wide-bandwidth design suitable for the full range of bass and keyboard instruments.

• Years produced: 1970s–1980s
• Made in: Italy
• Wattage: 500W
• Channels: 1

Tags: modern, solid-state, bass.

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.