They were in a smalled sealed enclosure, don't remember exact airspace but it would of been around the minimum required since I was trying to save as much space as possible. For SQ I thought they performed very well for what they were, they seemed to handle a good range of frequencies even at a higher volume. I'm not sure what subs to really compare them to though, but I can say they are definetly worth the money and trying them out! That's one of the things with audio; what sounds good and clean to me and others, may not impress you at all! I know I've gone through numerous subs to find the "perfect one" for me, but as you will probably find out (if you don't know already) is you will get one that sounds great and then get content with it and want something more, that's usually what happens! //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gifHow did you like the sq compared to other subs? Did you do sealed?