Selmer PA 100 Reverb preset

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

A 100-watt valve PA head from Selmer with built-in spring reverb. Six ECC83 input preamps mix into an ECC82 and EF86 gain stage. A 6BR8 and an ECC82 drive and recover the reverb tank, and an ECC83 long-tailed pair drives four EL34s from a BY128 diode rectifier supply. It has echo, reverb and normal returns, a reverb footswitch and lots of clean EL34 headroom.

• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: 7× ECC83, 2× ECC82, 1× EF86, 1× 6BR8
• Power tubes: 4× EL34

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