Well I wanted to buy 1 10 inch JL W7 but I heard they need a very large box.

I was wondering whats the best sub I can use without using a monster box.

I only want 1 10 inch high quality sub.

 

If you mean *NO* space, there's a Pioneer sub that goes inside the spate tire. You don't remove the tire, it goes INSIDE the rim. It's a pretty nice sub and enclosure. It's discontuned now though, see if you can find a used one or something.
~Tom

 

I have 2 JL 10's in the trunk of my vert. I think they were W3's but I can't remember for sure. They sit in a really small enclosure. Just go to car toys or something and ask them what the best sub is for a small space. That is what I did, and they sound great.

 

Rockford Power 10"
Kicker Solobaric (square) 10"

both require very limited amounts of air space in sealed enclosures. However...they both require a large amount of power to run either of them so you better have a high-output 2 channel amp you can run.