I got the hiss in my main ,and do not change with volume.The hiss from my main is not a problem because I am about 12 feet from them.My real problems are the surround ,there are about 3 to 5 feet from me(depend of my position in the sofa),is really loud with every mode ,including input from the dbs receiver(sony hd100),pioneer dvd 47-a(dvd-v,sacd or dvd-a).My connection: optical dig from dbs,coax from dvd.Connection from pre to amp :transparent cables. Before the 950, I was using a Denon 2800 as apre tomy B&K 7270 without this noise.