Hartke HA-4000 - Main preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Hartke HA-4000 is a solid-state bass amplifier head delivering 400 watts, featuring Hartke's distinctive 10-band graphic equalizer alongside a parametric midrange control. It became a reliable choice for working bass players seeking powerful, clean amplification to pair with Hartke's aluminum-cone cabinets. The HA-4000 offered flexibility for a wide range of musical styles.

Tags: american, modern, bass, solid-state.

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.