Kustom 400 preset

Close · 60/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Kustom 400 is a solid-state amplifier from Kustom, the Kansas company known for its tuck-and-roll padded cabinets. Its PC704B power amp board runs on +/-39.5V rails, with a differential input stage and four output transistors, and has a monitor output.

• Made in: USA
• Channels: 1

Tags: american, solid-state, vintage.

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.