Justin Ulysses Morse holds an RMS216 Folcrom over his head to impress nobody, a la John Cusack in Say Anything.

Makers of the original passive summing device

Analogue recording equipment from Minneapolis

Celebrating
20 years!

Roll Music Systems is based in Northeast Minneapolis, Minnesota. Co-founders Justin Ulysses Morse and John Sommer first met as art students and volunteers at the University of Minnesota’s student-run radio station, Radio K.

We started Roll Music as a recording studio in 1998, began building gear in 2001, and launched the RMS216 Folcrom as a commercial product in 2004. Twenty years later, we’re still dreaming up innovative gear to bring classic analog sound to your modern digital productions.

Audio Tools

Massively overbuilt analog audio equipment designed and built in the USA. Whether you’re a professional or hobbyist, working at home or on the road, your craft deserves professional tools that get the job done and sound great doing it. Explore our tube-based 500-series modules and the Folcrom passive summing device.

Available through our world-wide network of trusted dealers.

Four different Roll Music Systems tube-based 500-series modules. From left to right: RMS5A7 Tubule preamp, black. RMSB5T Vacbax tone EQ, green. RMSM5F Valveq midrange EQ, pink. RMSMC5 Valvop optical compressor, blue.

Summed Up

Not familiar with analog summing? Learn about the RMS216 Folcrom.
The original passive summing device created by Roll Music Systems.