i did read your original post and you clearly stated, "my stero guy told me you can fit a 12 under the seat but you lose the storage bin. Or he also said that its not very hard to make a box for 2 tens behind the rear seat you just have to remove the jack." so you clearly stated that you had seen 2 10's behind the seat NOT under it. 2 10's can be put UNDER the rear seat but you have to give up both storage bins to have enough air space. there is NO WAY to get the airspace required for 2 10's behind the seat. not only that but to install a box like that you would have to, as i stated earlier, remove the seat belts for the rear seats and the jack. also, you would have to remove the seats to install it since you wouldnt have enough room for the seats to fold forward. i have owned my truck for 4 years and have examined every option to install subs in the back. it can not be done with out MAJOR modifications and a LOT of money. and YES i am the know it all when it comes to car audio since i have been doing it professionally for over 16 years.Ok since I'm asuming that MyLt1 is just the know all about stereo systems then yes it was a figment of my imagination. I never saw the 2 10s in a 07 Frontier. Maybe if you actually read my original comment I clearly stated you lose the storage bin or have to remove the jack. Like I said it sounded like crap to me but I just love deep clean bass. Hence the reason why I have 2 12s in my other car and only one amp for the entire car. Oh wait I know I know thats not possible either right. If I could I'd post the pix but it just so happened that the day I went to ask about it he was just in the process of building the box for someone else. And the prices were my prices, I've been going to this guy since he opened his shop about 7 years ago so I get the hook up.
Oh and to clerify I do apologise, what i meant by no one makes boxes for our trucks, was if you just go to any run of the mill stero shop chances are they wont go and say oh yeah this one will fit. Its just been my experience so far, so dont go jump down my throat again, that the Frontier just has little to no room and the bends in the rear floor complecate things so just any old box wont fit. I dont know how it is for everyone elses truck but my nismo came with the rockford sub under the seat and the floor has a big hump in it, I'm asuming from the gas tank, so a box that runs side to side under the seat cant be put in.