Behringer BX1800 Ultrabass preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The BX1800 Ultrabass is a 180-watt solid-state bass combo from Behringer. The op-amp preamp offers an active/passive input, a mid-shape filter and four-band EQ, with effects loop, CD input, balanced line out and headphone output, driving a discrete transistor power amp.

• Made in: China
• Wattage: 180W
• Channels: 1

Tags: german, bass, solid-state, high-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.