About: http://webisa.webdatacommons.org/366050748

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	structure having reflector characteristics for low frequencies and horn characteristics for high frequencies, thereby achieving generally hemispherical distribution of the sound waves radiated by both types of drivers.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com