If you have a pair of high-end speakers and other equipment then this is a must to bring your speakers to their protential and the difference is Simply Amazing. I have a Mac 7200 and a pair of sonus Faber cremona M's. It seems that finely stranded copper wire for speaker wire creates a lot of crosstalk which was noticed in the early days of telephone. These correct that by using four conductors per speaker cable and really high quality connectors. My first experience on playing music with these cables was a previously pretty scratchy Pink Floyd album and these cables seemed to make the scratches almost disappeared. I purchased these speakers from a high-end shop and Houston and they sounded a lot better than when I got them home and I later found out that they were using a $4,000 pair of audio speaker wires. These audioquest type 4 cables restored that sound that I had heard at the high-end audio store! If you have a cheap crappie pair of speakers I don't think the cables would do much for them though. Next I played the classical piece by , Joshua Bell I think prokofiev Violin Concerto, and I knew then that I had made a very good purchase! So to conclude if you think spending this kind of money for speaker cables is kind of stupid think again! And if you don't like them it'll only cost you $10 to send them back and get your money back and they will send you the return form to be printed!