Rob Robinette RR800M-EF80 JCM800 EF80 Micro - Normal preset

Close · 62/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

Rob Robinette's RR2104 Master Volume Micro EF80 is an EF80 tube variant of the Marshall JMP 2104-inspired micro design, available as a DIY kit. The EF80 substitution offers an alternative tonal character for the British master-volume crunch in micro-wattage format.

• Years produced: 2010–present
• Made in: USA
• Wattage: 1W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 1× EF80

Tags: british, crunch, boutique, low-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.