I have a one month old Denon AVR-1804 and recently I noticed I have to trun up the volume more when watching DD DVDs. I use to watch them at -27, and it was nice and loud. Now I can barely hear it and have to turn it up to -23. I really notice it on DVDs that have both DTS and DD tracks. The DTS is loud always and the DD has to be turned up more thatn normal. Is this a normal breakin thing. I also have a 3 week old Denon 910 and 3 week old monster vid 2 component cable. Is everything breaking in so I need to turn it up or Im I going crazy. Have any of you guys noticed this too?