Rob Robinette Rr2104 Master Volume Micro Ef80 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

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.