If you haven't corrected your room/sub interaction before, you're in for a treat. I've always felt that what one is striving for when adding a sub or subs is to make your speakers sound seamlessly LARGER. Your room almost invariably gets in the way of that by causing huge peaks and troughs in the bass response. This goes beyond most receiver-based correction and allows for as much or as little tweaking as you like.
Here's a blurb on it:
The SMS-1 Subwoofer Management System improves the performance of any subwoofer by offering automatic bass-correction plus full DSP control. Using the included microphone and onboard eight-band digital parametric equalizer, you can automatically optimize your subwoofer's performance for any listening position in the room.
Do it all right from your favorite seat with the included wireless remote control. You can choose manual set-up, too. The on-screen display takes you through the process.
The SMS-1 is a slim but capability-packed component that plugs-in between your receiver or processor and your powered subwoofer, regardless of brand. It comes preprogrammed with four fully adjustable listening mode presets for Action Adventure Movies, Movies, Rock/Pop, Jazz/Classical, plus a fifth preset that you can specify. Each of the five presets can be totally customized to your tastes. Your sub adjusts to whatever program material you're listening to with the touch of a single button on the remote control.