Enclosure under seat help

[Sky]

I have a f150 ext cab and right now i have no back seat with 2 15in T1s in a vented box with a mono 3000watt amp. The box is def a lil to small then it should be. I miss having a back seat so im thinking of downsizing and putting some 12s under my back seat. I plan on getting a lift for the back seat for a decent size box. My questions are... what kind of subs would sound the best with a box like that. I was either looking into getting T0 12s or P3 12s. I really have no idea what to go about. Would it be a waste to put T0 12s in a not so big of a box? should it be vented or sealed? Just looking for some overall good input. Thanks

*Edit* So I was now thinking of building my box in the bed of my truck. Ive been reading over how this one guy did his. How would that sound? If I did that way Id get 2 18s or just keep my 15s.

[john253a]

there are many option and brands that will work in there,

my recommendation would be,

put the seat in, with lift and measure/draw up what space you have, and make you choose from there,

remember

"a smaller sub in the right space will outperform the larger sub in too small an airspace".

[Sky]

Thanks for your input bro

[Sky]

I was also looking into the 12in BTL's but still not sure

[john253a]

The only thing idd be looking at is mounting deepth and required cuft, of a few subs you like

Then once you know how big you can make a box, work out witch will work best in that space

[bdog]

sundown audio has a shallow sub

[Sky]

So I was now thinking of building my box in the bed of my truck. Ive been reading over how this one guy did his. How would that sound? If I did that way Id get 2 18s or just keep my 15s.