Some say it dates back 50 years, to when the late David Hafler introduced a tube amplifier with a "better-sounding" ultralinear output stage. Others claim it goes back to the introduction of electrical recording and playback in 1927, when
Gramophone magazine's founder and editor, author Sir Compton McKenzie, thundered that electrical reproduction was a step
backward in sound quality. But whenever it started, the "Great Debate" between "subjectivists," who hear differences between audio components, and "objectivists," who tend to ascribe such differences to the listeners' over-heated imaginations, rages just as strongly in the 21st century as it did in the 20th.