Originally Posted by basshead81
If you are going to run the subs +9db hot then turn off Dynamic EQ or use a RLO of -10 or -15. As I suspected your subs are being over driven down low due to how Dynamic EQ is applying its boost on top of your settings. It might not sound bad this way until you run into a movie scene that has some really low stuff, and now your subs are being called upon to play 120db @ 20hz A MV -10. You don't have enough woofage for that.
Here is an example of how dynamic eq works for the subs.
I don't know, Bass, sometimes I think that DEQ is a little bit misunderstood. I agree that the OP was probably using more subwoofer boost than he thought he was. But, the real problem, in my opinion, was that his trim levels were in positive numbers (due to the action of Denon's Subwoofer Level Adjustment) while his gain settings were only at 9:30. That was costing him a lot of headroom. I'm not sure how much. I suspect that in a 1400^3 room, he might have been okay, if his gain/trim applications were more in line with the suggestion I made. As you know, he really needs to keep those trim levels in negative numbers and the gain levels higher.
At -10 MV, DEQ only adds 4.4db of boost, but it adds some bass boost (2.2db) to all of the channels, and not just to the subwoofers. And, some people like the overall effect. My suggestion would be just to back-off the master volume, or the trim levels on the subs a touch, when necessary, if he wants to run them that hot. And, he should keep the gain levels on the subs high so that he will have access to the subs' full available headroom.
If he sets an RLO of -10, at a master volume of -10, DEQ will not operate at all, because it will recognize his MV as Reference. That's the way that DEQ works. An RLO of -15, at an MV of -10, would actually operate in reverse and subtract bass from all of his channels, because it would be registering an MV of +5. I don't personally like to use DEQ at all, because I don't particularly like what it does to the SQ in my system. But for people who do like it, I think that its actual use is generally pretty benign. At -10 MV, it's really not doing a lot, but some people still miss it when they turn it off. It's one of those YMMV things that people just need to experiment with.
Edit: I decided that it might be helpful, for people who may be reading along, to link a thorough explanation of exactly how DEQ works, and how the RLO settings affect its operation.