About: http://webisa.webdatacommons.org/135204597

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They were once used mainly for special effects, but they are now typically 'on' most of the time, especially to pull music out into the room.
http://www.w3.org/ns/prov#wasQuotedFrom	hometheaterhifi.com