I have a different driver in a o-b too and I could describe the sound that I hear as having the same quality as mbhcid just mentioned. I notice also that a cd could sound fantastic as another really bad.At first I tought that it was the speakers, the amp, but I realize that it was the recording. One other thing: is hearing so many detail info in the sound and recording such a good thing? because when you hear so many details you tend to focus your attention on the flaws that you're hearing. But when you have a well recorded cd, it's really awesome.