Did you put the little tiny rubber feet on? Before I put them on, I did get some vibrations.

No, they are not angled up. They have a pretty impressive dispersion field and I have less than 10 degree angle. The bass is probably what makes the difference in soundstage. When you don't have anything to "anchor" the perception of position, I find it is hard to get good soundstage. I tried this once (2-3 months ago) with the M80s by setting their xover at 150hz and shutting off the sub. It sounded airy and, altough I could pick up at all the instruments as well as before, they felt ghostly and unreal. With my AB up, it wasn't anywhere near as drammatic, but it feels similar (I just tried by raising my 9" with kleenex boxes--actually, they were "noname" tissues, but I don't think there is an audible difference).

Did you try with mouse pads under them?

Curious to explore this more (as long as you're the one doing the job!).

See Mojo's signature