Selmer PA 100 Mk II preset

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

Selmer's 100-watt valve PA head in Mk II form. Several ECC83 input preamps and an EF86 stage feed an ECC83 long-tailed-pair phase inverter and four EL34s, with a diode rectifier and echo send and return. Like other British valve PA heads of the era it was also played through as a loud, clean guitar or bass amp.

• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: ECC83, EF86
• Power tubes: 4× EL34

Tags: british, vintage, el34, high-wattage, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.