Hi all! I recently discovered how much air noise my Definitive Technology ProSub 100s generate. They sound AWFUL. Bass is loose, uncontrolled and they tend to bottom out and make terrible noise (I have two of them). I have been thinking about stuffing their port with compressed cotton, so that the cone sees a "sealed" enclosure. I understand I'll lose some efficiency, but I hope to have a better damped and fuller sounding system. Should I do it? And if it works, would you recommend closing the air ducts of my BP8bs too? I don't worry too much about efficiency, since I also have a 15 in. sealed PF-15TL (Definitive) that will handle the LFE. Thanks for your help!