OK so here is the hopefully last thread on my truck. I am buying a prefab box. I know no one recommends a pre fab box but there is only one way to fit it under the rear seat in my 2014 F 150 super cab. Unless I decide to take more floor space for more air space its kind of a set design. Id rather not eat more floor space because the back does get used a little bit. Anyways http://www.soundoffaudio.com/2009-2014-ford-f-150-extended-cab/ http://www.supercrewsound.com/09F150ECUTSdual.html Are the two I am looking at. No matter what air space is .80 cube before sub. I was wondering if for the space, I could get a little better smaller subwoofers. Instead of getting low end larger subs that dont take as much if I went with smaller 8" subs. Though they cost more, there are much better quality subs that would work for me. Example I was planning on RE REX 10s, then I decided REX 12s but looking at it vs say a Sundown SA 8, the SA 8 is a much nicer sub that takes more power and will move more air (although have less cone area). I guess all I am asking is if I should get as big as sub as I can fit/afford/use for enclosure or if I should get the highest quality sub I can even if it means going smaller? Would anyone care to comment on size vs quality? I am not sure how to approach a box this small and this little volume? Last truck I had I took half the back seat and had an SA 15 in it in an extended cab pick up and it was awesome. Not looking for the same out put this time though. Just low end that sounds good.