Polytone Mini Brute Preamp preset

Close · 70/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Polytone Mini Brute became the standard jazz guitar amplifier for touring and session work over several decades, beloved for its transparent, ultra-clean solid-state tone. Its lightweight construction and reliable performance made it ubiquitous on jazz stages and in recording studios worldwide.

Known for: Joe Pass, Herb Ellis, Pat Metheny.

Tags: american, solid-state, vintage, clean.

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.