Carlsbro 200/7 PA Slave preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Carlsbro 200/7 PA is a 200-watt valve PA head. Inputs 1 to 6 run in pairs through three ECC83s and input 7 through a fourth, each with its own volume, treble and bass, mixed into master treble, bass and volume with echo sockets and a sensitivity control. An ECC81 long-tail inverter drives four fixed-bias KT88s at about 720 V. The slave version drops the input stages and runs as a power amp only, for large PA and backline rigs.

• Made in: UK
• Wattage: 200W
• Channels: 1
• Preamp tubes: 5× ECC83, 1× ECC81
• Power tubes: 4× KT88

Tags: british, vintage, kt88, high-wattage, power-amp.

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.