Ceriatone HRM Mk2 50 preset

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

The HRM Mk2 50 is the 50-watt version of Ceriatone's second-generation 'Hot Rubber Monkey'-style Overdrive Special. Three preamp valves run a pull-bright volume and a relay-switched overdrive with drive and level into the HRM tone network (treble, middle, bass) and master, with Rock/Jazz, Mid-Boost and Deep switches and presence. Two EL34s on a solid-state rectifier; footswitched OD and PAB, preamp out/power amp in and an OD trim.

• Made in: Malaysia
• Wattage: 50W
• Channels: 1
• 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.