I read a post about the Denon 3800h being underpowered. I usually listen to it around 55-60% volume, anything over 65 is usually too loud for me anyway. Im not used to see the Vol shown in this way. The Denon 2809 used -db's. I suppose I can see how some would find it underpowered, but it's all I would ever need, but it did make me wonder about these SVS subs. The Audyssey set the for me at around 3/4 full according to the panel on the back of the sub. I manually set them higher and saw how much more powerful they are, then immediately turned them back to original setting. I guess the Audyssey knows what it's doing, because I obviously don't! Im not sure what I expected from multiple subs, but this room is SO FULL of sound I am curious what these height speakers are going to do for me??? Maybe I thought I would need to "tweet" everything? But that doesn't seem necessary. I also never thought spatial audio was necessary, but now it's all I want to listen to...well, that's not true. Some things sound "correct" and other just don't.