About: http://webisa.webdatacommons.org/14549252

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	The output impedance was a moderately low 551 ohms at low and middle frequencies, dropping slightly to 536 ohms at the top of the audioband.
http://www.w3.org/ns/prov#wasQuotedFrom	stereophile.com