Pro Co Sound is a Michigan Corporation founded by Charlie Wicks in 1974. Pro Co builds audio cables and related products for two distinct channels: Musical Instrument (stores, catalog retailers and distributors) and Sound Contractors (as well as recording and touring sound professionals).

Pro Co serves the standard products market with a catalog of 1700 useful items, as well as custom offerings. Major product offerings for musicians include stage and studio cables (Guitar, Microphone, Speaker and MIDI cables), Multipair Audio Cables (Snakes), the RAT (Earth's most successful fuzztone), plus the 1000s of one-off specialty products (including black-box products) needed to properly hook up the needs of their customers.