are the dimensions put up on the JL audio site for their 12w7 good for an Eclipse Ti 12" ? its a vented box.. slot ported.. will the Ti work good in it ? the dimensions are given beautifully in the diagram.
i may work, but the hole cut-out and the tuning frequency of the box may not suit you Eclipse sub. if i were you i'd design a box just for that sub.
designing a box isnt all that hard to do man...
you can get free subwoofer enclosure software in a lot of places, but prolly the best known program is WinISD (its a pretty good program, i use it all the time) you can get it on team linearX's site if i remember correctly.
just see what kinda space you have to work w/ in your vehicle and post another thread with info on your vehicle, someone here should be able to help you out.