Well, after buying the 4.1's back in March, I had recieved a defective set...boo... So, I send back my sub amplifier as per agreement by Klipsch customer support. I get back my new sub only to find out that the hissing in the front left channel has been fixed! The wonderful fix was to send me a power amp that DIDN'T work!! I got no sound at all. Finally, they tell me that I should send in the whole unit so it could be replaced with a brand new one. I have yet to recieve anything and its almost June. Now they have the 5.1's out, and I have 4.1's somewhere that I havent been able to even use. I have heard no word from Klipsch on the status of my speakers either...