Westbury 255 Bass (110 / 115) preset

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

The Westbury 255 is a small solid-state bass amp sold by Unicord in 255-110 and 255-115 versions. Two inputs feed a K117 JFET stage, a passive tone network with two 250K controls and a 10K control, then a Volume with a Bright switch and two more JFET gain stages with a line out. A JFET driver feeds a quasi-complementary transistor output stage on a single 39.5 V rail, capacitor-coupled to a 4-ohm speaker, from a bridge rectifier.

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Tags: 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.