I has been really hot lately for the WS5'S so today I took out the plug in backbones. Right away I noticed a more bass sound using full tones. Just wasn't getting those high tones for the high conductors and the steel bottlecaps. I couldn't get used to the difference so switched to 5 tones and still not as good, so I went back to the WS5'S. Is there that much difference in the impedance to cause that? Anyone with experience out there have an answer on the difference?