So I've got the HT set up in my new house and I am running through the test tones on my Denon receiver. Anyways, I get everything setup at a nice 80db except for my 16-46CS+. I can't get the meter to settle down. Even on C weighting and slow response, the needle swings from 78 to 82db. That is around a +4.5db gain setting on the receiver. I am using an Outlaw M200 monoblock to power the sub. Is this just a room problem I am having or is it normal?