About: http://webisa.webdatacommons.org/282651802

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	Various techniques of dealing with voltage and impedance matching, such as vacuum tubes, transistors, linear buffers, transformers, and even optical transfer can be found.
http://www.w3.org/ns/prov#wasQuotedFrom	audioreview.com