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Electronics is the study of the flow of charge through various
materials and devices such as semiconductors, resistors, inductors,
capacitors, nano-structures and vacuum tubes. Although considered to
be a theoretical branch of physics, the design and construction of
electronic circuits to solve practical problems is an essential
technique in the fields of electronic engineering and computer
engineering.

Interesting idea , acoustic guitar+singer recorded professionally and then
played back in front of a couple of pairs of ears via 2 different pairs of
speakers , in turn, driven from the same amp and also the live performer
again, for 3 way comparison.
What did the human ears detect, so readily, to distinguish the live
performance?

http://gadgetshow.five.tv/jsp/5gsmain.jsp?lnk=401&featureid=776&pageid=1287&
show=s8e9§ion=Features

They also ... pit some high end Kef speakers against a more affordable pair:
will Suzi and Jason, blindfolded, be able to tell the difference between the
speakers and a live performance?

Tim Daniel, performer

KEF Reference Model 207/2