Ashdown ABM 500 Bass Magnifier - Clean preset

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

The Ashdown ABM500 Bass Magnifier is the flagship bass amplifier from British bass specialist Ashdown Engineering, featuring a hybrid design with a tube preamp stage feeding a powerful solid-state power section delivering 500 watts. Founded by Mark Gooday, a former Trace Elliot designer, Ashdown built their reputation on the ABM series with its warm, harmonically rich bass tone and the distinctive VU meter that became a brand signature. The ABM500 has been a standard on professional bass rigs worldwide since the late 1990s.

• Years produced: 1997–present
• Made in: UK
• Wattage: 500W
• Channels: 1
• Preamp tubes: 1× ECC83

Known for: Mark King, Andy Fraser.

Tags: british, bass, 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.