Okay so I have a 2002 Chevy Malibu. I just want to get a few ideas on how big of a box you guys think I can fit in it. I want to try to fit some xcon 15's ported and firing into the cabin sealed off from re trunk but I don't think that is going to be possible. Lol I would like to do them ported. I think 2 15's sealed would probably fit. Or should I just fit 2 12's ported with the same install, trunk sealed. What do you guys think? I have only owned a sealed prefab box, under powered, kicker L7 15's. I want to feel the lows alot better and have it sound better. Probably tune the box to 28 for 15's and 30 for 12's. I just don't want to get 12's and not be satisfied? But I'm sure 3000 rms on some 12" xcons would be impressive.