Orange AD200B Mk III preset

Close · 62/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

Orange's 200-watt all-tube bass head, in its third revision. A simple ECC83 preamp with gain, three-band EQ and master drives an ECC83 long-tail-pair inverter and ECC81 drivers into a bank of 6550s. It is known for huge, warm, overdriven bass tone.

• Made in: UK
• Wattage: 200W
• Channels: 1
• Preamp tubes: 2× ECC83, 1× ECC81
• Power tubes: 4× 6550

Tags: british, bass, 6550, high-wattage, modern.

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.