Fuzzy white noise sound coming from tweeter?

Hi everyone, I just bought a floor demo model of the B&W 702 S2 paired with a demo model of the Rotel RA-1592 integrated amplifier and connected with Rocket 11 speaker cables. I noticed there is a quiet static or white noise sound coming from the tweeter on both speakers. It does not seem to increase in volume when I turn the volume up and I cannot hear it much from where I sit, but it is very pronounced when I put my ear up to the tweeter while playing a song. The noise is also there when I pause the song and apparently anytime the amplifier is on. The speakers are not bi-wired. I was told that maybe this could be caused by intereference with power cords but I moved all the wires away from eachother and the problem still persists. I have also tried playing movies from a bluray player via optical cord and that is also having the same issue. Could this have anyting to do with the break-in period? It is not overwhelmingly noticable from where I sit but I think it is slightly masking the clarity of the high frequencies. I would try to isolate the issue using other speakers/amplifiers/cables but I do not have any others to subsitute in. If anyone has any ideas or suggestions I would greatly appreciate it!