I've heard the big Beolabs at the Beverly Hills B&O store on at least three occasions. They sound very good till the spl goes up - at which point they become a complete mess featuring compression, significant tonal shift and audible break-up. I'm not talking live rock concert level here, either. It could be unique to the sample/set up at that B&O store, but you would hope that the sales/mgmt people address the issue at some point and I heard the same problem on all 3 visits, which spanned more than a year.
Marty
Marty