pro-rabbit
5,000+ posts
Moderator
This is very true. A prefab sealed enclosure is not all bad at all. As said you will need to silicone all edges/corners on the inside of the enclosure. I would also silicone around the speaker terminal as the cheaper ones tend not to seal all that well.Prefab sealed boxes will sound just as good as a custom one. All you need to do is make sure its the right size, grab a bag of polyfill if needed, and make sure you seal off all the corners. The issue with prefab sealed boxes is that almost all of them are not sealed right in the corners so they have air leaks.
In my experience SQ(again if there is such a thing when discussing low end) can be had with ported or sealed. The determining factor is what you want out of your application and what the subwoofer was designed for.
A general idea that sealed or ported is better then the other is not true, as it is 100% different for every application and person. Remember also that sound is subjective to the listener. So no one likes/wants the same thing.