Fender Bassman 150 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bassman 150 is a mid-2000s solid-state bass combo from Fender's F.B.A. line, unrelated to the tube Bassman amps. One input feeds an op-amp preamp with volume, compressor ratio, a contour control, bass, low-mid and high-mid levels with their own frequency controls, and treble. A pre/post line out with level and ground lift, a mute switch and a master volume follow, driving a discrete transistor power amp into the woofer and a horn. It is a modern, clean bass amp.

Tags: bass, solid-state, clean, high-wattage, american.

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.