i have had the worst luck with boxes so far, iv spent about 500$ on them and there all **** i first got one off of ebay, but it was for a 4thgen one and got screwed,then i got a second one that one side was almost 2x the size as the other which caused 1 sub to hit harder. then i bought a 300$ box yes i know but i was so frusterated i didn't care, and it was a ****ing truck box bractically it doesn't even go down the well in the back of the car. i have 2 12s very good onces with a 2000 watt apline amp, i just need help on building one or buying one whatever, ported sealed i dun care i pefered ported.

 

Search the forums. There's even some very great plans that were just posted in this thread https://www.thirdgen.org/forums/car-...-done-now.html

 

Yeah your best bet (and least expensive) is to build one yourself. The plans at the end of the post True linked to are excellent and very detailed. Another option might be to find a local audio shop that does installations and see if they can build a custom box for you.

 

I made my own but you can get a custom box from crutchfield.com.