Ceriatone Hey What?! 504 OL - Normal preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

Ceriatone's 504 OL is a Dumble ODS-inspired design, built in Malaysia with hand-selected components. Based on the legendary Dumble Overdrive Special at 50 watts, it provides pristine clean tones and a harmonically complex overdrive channel.

• Years produced: 2010–present
• Made in: Malaysia
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× EL34

Tags: american, clean, overdrive, boutique.

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.