Carlsbro CS100 PA preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Carlsbro CS100 PA is a 100-watt valve PA head. Four inputs, each with its own volume, feed two ECC83 stages. These mix into a shared tone stack and master volume. A third ECC83 drives four EL34s, powered by a solid-state bridge rectifier. Reverb take-off points are provided.

• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: 3× ECC83
• Power tubes: 4× EL34

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

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.