Carlsbro 100 Top preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Carlsbro 100 Top is a single-channel 100-watt British valve head. An ECC83 preamp with bass and treble controls drives an ECC81 phase inverter and four EL34s on a silicon bridge rectifier at about 470V. The result is loud, clean-to-crunchy British power in the Marshall/Hiwatt mould.

• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: 1× ECC83, 1× ECC81
• Power tubes: 4× EL34

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

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.