Claude, I have a friend who has tried these Quads with the sock down, and I have heard and seen them both ways at his place -- to my ears, the sound doesn't improve. It is DIFFERENT ever so slightly, audible only on some material, but it's too close a call to say the quality improves or declines. And the aesthetics are horrible. Also, I think the manufacturer warns against the possibility of damaging the exposed panels. These speakers are so good that there is simply no reason, in my opinion, to try to tweak them to a higher state of performance, other than trying different room orientations, amplifiers, etc. I suspect any musical flaws in the performance of the Quad 989's are due strictly to equipment mismatches, difficult room set-up conditions, or bad software.
Gerald Clifton, gkcc3@netzero.com.
Gerald Clifton, gkcc3@netzero.com.