Carvin BX120 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The BX120 is a solid-state Carvin bass head. An active/passive input feeds cascaded JFET stages with a drive control, then a contour control, treble, bass and a sweepable mid, and a five-band graphic EQ from 80 Hz to 2 kHz that can be footswitched. An optical compressor, effects loop and master volume follow, with a balanced XLR DI and phones out, into a discrete class-AB power amp with Darlington outputs, run from a switch-mode supply.

Tags: american, 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.