Site loads in less than 3 secs for me. For the folks having problems with the site try running fully updated virus and spyware scans. Sounds like some malware. I have been repairing computers since 1976 and those are typical symptoms of malware. Also try going to Acoustic Zen from a different computer to help prove if a problem is in you main computer.
I havent been to that site for a while but I must say the new CRESCENDO Loudspeaker looks very interesting.