Jak Plugg is a Canadian designer of open-source Eurorack modular synthesizer modules, best known for re-laying out popular open-source designs — particularly Mutable Instruments modules — into smaller form factors with refined panel layouts. The work is published on GitHub as PCB and panel files, then sold as PCBs, panels, kits, and pre-built modules through partners such as Pusherman Productions.

The catalog includes Monsoon (a 12hp variation of Mutable Instruments Clouds, often built with bi-color illuminated faders for granular control), Rangoon and nRings (Rings-based designs), Pachinko (a 12hp take on Marbles), beehive (an 8hp Plaits), m-Brane (a 6hp Yarns), uO_c (an 8hp Ornament and Crime), T_u (an 8hp Temps Utile), and other modules such as Typhoon, Alps, Pique, TWIIGS, and the uTest module tester.

The designs occupy a niche between DIY culture and boutique synth building: open hardware that emphasizes compact HP footprints, alternative control schemes (illuminated faders, expanded CV inputs), and adaptations of community-favorite firmware. Modules turn up regularly on the secondhand market through Reverb and dedicated DIY synth shops.

Jak Plugg has 2 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 1 artist, with the strongest followings in Electronic and Pop. Notable users include Andrew Huang.