About: http://webisa.webdatacommons.org/296805277

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	Previous efforts to address this problem have focused on including additional voice coil and magnet systems forming a push pull system within the enclosure to increase the Bl product and hence the sound output.
http://www.w3.org/ns/prov#wasQuotedFrom	patentlyapple.com