Red Bull Records edition Audio Pro Addon C5 Compact High Fidelity WiFi Bluetooth Wireless Multi-Room Speaker. AUDIO PRO is a Swedish audio company with solid Hi-Fi heritage. Nearly four decades ago in 1978, we started building powered speakers with a single ambition in mind; to give you the best sound quality at the best value possible. In the 1970s, Audio Pro launched a series of active speakers that, thanks to their advanced technology and high-quality sound, became iconic milestones in speaker history. Today, Audio Pro is pursuing the same goals in speaker design, great sound from small speakers. All powered and all wireless.