# Gridleak > Circuit-accurate guitar amp presets for Fractal and Line 6 hardware, derived from real amp schematics. Gridleak builds guitar amp presets by extracting parameters from original amplifier schematics using AI. Every preset traces to a real circuit — not ear-trained captures. ## What Gridleak offers - [Browse presets](https://gridleak.app/browse) — library of amp presets with confidence scores - [AI Tone Generator](https://gridleak.app/generate) — describe a tone, get a preset - Supports: Fractal Axe-Fx II, Axe-Fx III, FM3, FM9; Line 6 Helix Floor, LT, Rack, Native, HX Stomp, HX Stomp XL ## How presets are made Each preset is derived from the original amplifier's schematic. An AI extracts component values, topology, and gain staging from the schematic, then maps these to the modeler's parameter space. Confidence scores indicate extraction quality. ## Confidence tiers - **Schematic Verified** — Complete schematic with all circuit values readable. High confidence in parameter accuracy. - **Schematic Close** — Most circuit values readable. Some parameters estimated from circuit topology. - **Pipeline** — Partial schematic data. Parameters are best estimates, improved over time. ## Pricing - Free: 5 downloads/month - Pro Monthly: $14.99/month — unlimited downloads, AI generator, direct MIDI install - Pro Annual: $99.99/year — save 44% ## Contact hello@gridleak.app