What speaker cable made a major difference in the sound quality of your speakers??

When I went from Omega Micro Planar 1s copper ribbons which were a significant improvement over the many different cables I've had in the past to Omega Micro Planar 2 copper ribbons. What's the difference? In a nutshell greater resolution, leading to more accurate tone, better separation of voice and instruments, more realistic sounstaging and imaging and greater overall resolution of detail. This cable is decidedly not a "tone control" as some cables clearly seem to be to me. It is a conduit to allow more of the music through. I have found Nordost cables to have similar qualities as well.

To your point Edward506, I totally agree with you that room and speakers would be much more important than cabling. Not to belabor the point and I truly am like you, I don't care one way or another what people believe, maybe some can't hear and I respect that view as well.  I used to believe the same until I listened and I could clearly hear differences, ic, remember the first time it happened to this day. Some make more of a difference than others, some make no difference and some make PROFOUND differences. I have several very expensive cables that I no longer use but still like. They have been replaced by a couple pair of home brewed cables with silver and gold wire that are quite special, the wire wasn't cheap either. Also I have coper  ribbons I use for my tt set-up to pre which I prefer over the homebrews in THAT application. Believe me, listening to cables makes you a better listener, but it can take work at times, enjoy!