http://www.kicker.com/06/tech-suppor...0b01%20WEB.pdf

here is the manual for the L7. its got recommended box volumes, power handling, etc. page 2 has the sealed designs if you dont want to design your own. good luck to ya!

I appreciate it.

I will say, about the L7, or any other speaker like it, that one thing that drives me insane, is that the most efficient speaker is a round speaker. A square speaker is so much less inefficient that it makes baby Jesus cry. Thats my opinion though.

L7 are great for being loud. My friend had 2 in his ford explorer and had a vented box that took up the whole "trunk" area....it was loud and hit pretty low but it really depends on what you want, for SQ I would go with something else, don't get me wrong, they sound good but you can do much better for SQ...for loudness, they do great. Vented boxes in a trunk of a car isn't gonna work the best, they can sound pretty good in sealed boxes, polyfill helps too, it just depends on what you are really going for.

so what would you pick? L7 or audiobahn Immortal listed above?

Well looking at 1-JL W6 now and I am leaning this way because on SQ. What do you guys think? I added a poll to so I can narrow this down a little.

Out of the 3 in the poll, the W6 will be the best quality, and the cleanest sounding.

IMO, I'd also look into the FI Q or a RE SX.

definitely with you on the jl w6, very good sq driver. although they are a little pricey! out of the drivers you have to choose from, your best option for sq here is the w6.

like i posted before, if youre aiming squarely at sq,and youre open to suggestions try the shiva-x. you will not be disappointed. the aforementioned FI Q is also a pretty good choice.

EDIT: i voted two subs for the price of one, because you could get 2 shiva'* for the price of one of those w6'*