Ceriatone Overtone Special 183 50 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The OTS '183' 50W is the 50-watt version of Ceriatone's #183-voiced Dumble Overdrive Special-style amp. A FET-buffered input and three 12AX7s run a volume into treble, middle and bass with Rock/Jazz, Mid-Boost and three-way Bright switches, then a relay-switched overdrive with ratio and level, a master and presence. Two EL34s on a solid-state rectifier; footswitched OD and PAB, OD trim and preamp out/power amp in.

• Made in: Malaysia
• Wattage: 50W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 2× EL34

Tags: boutique, hand-wired, clean, crunch, mid-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.