Historically important 1977 blind comparative testing of three amplifiers. This test was not simply intended to show that amplifiers which measure competently will sound the same, rather it explores what can make them sound different. I've converted the pages into a pdf document. Well worth a read. [URL="http://www.audiosmile.com/forum/articles/Quad Comparative.pdf"]www.audiosmile.com/forum/articles/Quad Comparative.pdf[/URL]
