Well let me start off with...this is my first system ever. I've been reading and talking to helpful forum members on many forums and have put together my own research and have decided to use ported. Using WinISD, with the specifications it also says ported is the way to go. Unfortunately I do not know how to operate WinISD too well so I havent gone farther than that. What I've heard is laughable. Prelude with Alpine Type R 12 and some infinity components and 6x8s i think? Maybe 6x9. The nicest I've heard was my friends evo, but he didnt turn it loud, it was just clear as hell. All i know was that he was running a JL 10W3 i'm pretty sure but he did alot of work to the engine as well as speakers so I'm sure it wasnt terrible. EDIT: Almost positive that these are all sealed enclosures.