Ceriatone JCM51 All Access - Plexi preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The JCM51 All Access is the 50-watt version of Ceriatone's JCM800-plus-Plexi head. Relays footswitch between a Plexi channel with its own volume and a JCM800 channel with gain and master, each with a three-way bright switch, sharing bass, middle, treble and presence. Three ECC83s drive two EL34s, with a post-PI master, buffered effects loop, extra-gain, V2A cathode and three-way feedback switches and a half-power switch.

• Made in: Malaysia
• Wattage: 50W
• Channels: 2
• Preamp tubes: 3× ECC83
• Power tubes: 2× EL34

Tags: el34, crunch, boutique, hand-wired, mid-wattage, two-channel.

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.