Sonos offers a popular line of WiFi-based networked speakers that are essentially a consumer distributed audio system. It's a (relatively) affordable and easy to use spin on the network-based audio rendering systems already common in large building background music/PA and, increasingly, entertainment venue and theatrical sound reinforcement. The core of it is this: instead of distributing audio from one amplifier position to multiple speakers over expensive and lossy (in commercial contexts) or difficult to install (in consumer contexts) speaker-level audio cables, audio is distributed over an IP network to a small amplifier colocated with each speaker [1].