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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	Low frequencies are the most difficult to play and only are accomplished by tightening the headphones and with Philips headphones, it is not necessary, fit any ear and bass sound are excellent.
http://www.w3.org/ns/prov#wasQuotedFrom	sonicelectronix.com