No, it'll be a sealed enclosure. I would never do anything else.
Diamond Audio is awesome gear. Not too many people have heard their stuff. Their M5 separates are comparable to the A/D/S 3 series, and the Hex Series are comparable to DynAudio.
As for the woofers, they pound, and are incredibly clean. The M3s sound very comaparable to the W6, and are much more power efficient and quite a bit cheaper. The M5s are better, and the MacDaddys are aptly named. If you've never heard them before, go to
www.diamondaudio.com, find your closest dealer and give them a listen. You'll be impressed.