The mx's are very very nice subs. I have ran the 12's 15's and 18's. They are great in both sealed and ported enclosures. If running sealed plan on running alot of power. The only b!tch i have with them is the mounting depth.//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif