Reuss Musical Instruments is a boutique guitar effects pedal maker founded by Danish journalist and electronics hobbyist Anders Marcuslund-Reuss and based in the Copenhagen area. The brand grew out of a personal tribute project: after the death of The Birthday Party and These Immortal Souls guitarist Rowland S. Howard in 2009, Anders built a clone of one of Howard's signature fuzz pedals, and online interest in the build eventually turned the one-off into a small manufacturing operation under the parent entity Good Guy's Media & Music ApS.

The catalog is weighted heavily toward fuzz, distortion, overdrive, and boost circuits, with a particular emphasis on officially endorsed artist signature pedals. Notable signature models include the RSH-02 and RSH-03 developed in association with the Rowland S. Howard estate, the Plasmatron for Mogwai's Stuart Braithwaite, the Muzzbox for Warren Ellis, The Tingler for Kid Congo Powers, Wine and Roses for Steve Wynn, Recidivist for Chris Brokaw, and the Fzzxkrrrxzt! for Swedish band bob hund.

Pedals are assembled by hand in the European Union, with work split between Denmark and an electronics partner in Bulgaria. The brand occupies a niche aimed at players drawn to post-punk, noise rock, and alternative guitar tones, and its releases are frequently covered in outlets such as Premier Guitar.

Reuss has 14 products cataloged on Equipboard, including Fuzz Effects Pedals, Overdrive Effects Pedals, and Multi Effects Pedals. Their gear is featured by 9 artists, with the strongest followings in Rock, Folk, World, & Country, and Electronic. Notable users include Gross Net, Stuart Braithwaite, and Warren Ellis.