Sean34 - I also heard a demo using Focal Utopia speakers (I think it was the Scala). It wasn't a perfect setup because it was during an event where there were a lot of people in the store, but I could convince myself that there was a difference. What I told the salesman was that I could hear the A/B difference, but I doubted that I'd ever notice if they were not installed and nobody let me in on the secret.
When I did some A/B stuff at home I can easily describe the difference that I hear. On one particular CD there are areas about half way to the center from each speaker where I can almost hear things overlapping without the kones, but with them installed everything has air around it. It sounds like snake oil to me when I say it out loud, but it's my placebo and I'm sticking with it.
Ironically, I installed foam corn pads (i.e. donuts) on the bottom of the SACD player to prevent it from sliding off of the kones and I swear it sounded worse than without. That's an even harder setup to A/B, but I took them out. My theory is that the foam pads were providing a level of damping that was directing the vibrations around the kones.
When I did some A/B stuff at home I can easily describe the difference that I hear. On one particular CD there are areas about half way to the center from each speaker where I can almost hear things overlapping without the kones, but with them installed everything has air around it. It sounds like snake oil to me when I say it out loud, but it's my placebo and I'm sticking with it.
Ironically, I installed foam corn pads (i.e. donuts) on the bottom of the SACD player to prevent it from sliding off of the kones and I swear it sounded worse than without. That's an even harder setup to A/B, but I took them out. My theory is that the foam pads were providing a level of damping that was directing the vibrations around the kones.