Impact 100W Head preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Impact 100 was a 100-watt solid-state head produced by Impact, a smaller regional amplifier brand active primarily in the UK and Australian markets during the 1970s. Its straightforward two-channel design covered clean and overdrive voicings suitable for the working guitar and bass player. The unit was positioned as a budget alternative to the dominant British brands, offering similar power ratings at a lower price point. Build quality was functional rather than exceptional, aimed at the practical demands of the club circuit.

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.