This doesn't have anything to do with auto-eq. On your Denon, if you go into the DD or DTS menu, you'll see the Cinema Equalization selection. Change that to "Yes" if your speakers aren't behind a screen.

I don't suppose its just some poorly recorded sections in the movie and the system is just exposing it as such?

Having the Denon EQ (or any other brand) on after autosetup CAN affect the sound of the speakers, especially at higher levels. And that goes for modes other than DD or DTS. After initial setup, with EQ turned on, my m60's sounded to harsh sounding because the midrange/high frequencies were enhanced by the eq settings.

After turning these features off and using a non altered signal, the music sounded natural and true to the source.

That goes the same for tone controls in my opinion.

How long have you had your system? If you've had it a while and this has just started happening, then you need to contact Axiom. Maybe something's fried in the crossover.

BTW, I was listening to Diana Krall live in Montreal on DVD DTS tonight and the only thing that will fix her sibilance is jaw reconstructive surgery. Her CDs are all that way too although maybe not as pronounced.

JB, even those who like to create imaginary sound flavors for receivers would put the HK in their "warm" list rather than their "bright" one, so you can disregard what you read on that point.

If you have EZEq off, that can't be part of the problem, but you might try the EQ process on the chance that it would help(which some users report)rather than hurt.

As was mentioned, Re-Eq is a proprietary THX process to reduce high frequencies in some movies which sound excessive in home listening. The 635 isn't THX and doesn't have it, but applying some treble cut with the tone control on offending material has a somewhat similar effect.

If you've checked carefully enough for a damaged tweeter(my first suspicion), it would appear that some of the material just has too much treble for your listening room(or you should listen to your wife and turn it down).

I'm going to try the EZEQ setting to see if I hear an improvement.

Just to double check. What should my crossover's be set at?

Does anyone know of this feature inside the Dolby Digital setup called Night Mode? It's set at the "Mid" setting.