I just finally gave up on my AA Capitole Mk IISE: I'd bought it used,sent it to Globe Audio in Toronto for the SE upgrade, got it back and had nothing but constant, though different (output level freeze, lose one channel, shut down entirely, etc.): sent it back to Toronto once and to the service center in Phoenix 4 times over the next two years. You might want to pursue an inquiry into the reliability of each machine. Also, I understand that Globe is now out of business and AA is looking for a new North American distributor. Maybe I am an exception (but I don't think so), but I probably put $6,000 altogether into the AA and have nothing to show for it and no response from AA, Globe or Sedonix (repair). So now I have spent another $6k to replace it with an Audio Research LS17 and Primare 32 and they sound fantastic together- and they WORK.