Simms-Watts 100W Pa100 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

Simms-Watts was a British amplifier company that produced high-powered tube amplifiers during the late 1960s and early 1970s, competing with Marshall and Hiwatt in the professional musician market. The PA100 was a 100-watt all-tube head offering substantial power for large venue use with EL34 output tubes characteristic of British designs. Simms-Watts amps are now rare and collected by enthusiasts of obscure British vintage amplification.

Tags: british, vintage, crunch.

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.