10in under passenger seat?

hey guys.. tell me if u think im insane.  dont know a whole lot about car stereos, some of the setup info is messing with my head right now.  but in the mean time let me tell u about my idea for the setup

10 inch sony sub under the pasenger seat.  theres just enough volume under the seat to match the specs, but when u add the driver itself it will be under so i was gonna put some foam carpet underlay stuff in the box to get up to the right suspension.  my only concern is that the driver is going to be right in the padding for the seat.  the only part of the box that will be open to air will be the front and back of the box, which will only be about 5 inches tall, with the driver mounted upwards.

now concerns i have are, how do i know how much padding to put in?  will too much padding give me trouble?  and does the driver stand to get damaged by facing up?  and again, how muffled will the sound be if the driver is butted right up to 4 inches of foam?

any other concerns or thoughts are appreciated.

Subs need room to breath (at least an 1.5" or so in front of them). You don't want the cone or surround hitting the seat. This could damage the sub and make it sound like crap.

The trunk is usually the best location for a sub in a car. You could try fiberglassing an enclosure if you have a storage pocket or some unused space.

If you still want to determine if your sub could be used in a downfiring or upfiring position you can use this simple calculator. http://www.accelerator-pedal.com/sag.htm

ok so if i could manage to give it a little bit of breathing room.. just enough of a gap so that theres atleast an air flow over the driver?  im really set on doing it like this cause i use my trunk space a lot, moving furniture and stuff.. in my escourt, i know.  anyways.

so just try for a little gap, enough to not impede the airflow.. and obbviousely so theres enough room for a full stroke on the driver.  right?

www.earthquakesound.com   go here and look at the SWS (shallow woofer system)

A 12 that mounts in 3 inches of depth, a 10 in 2.5.....they work real well.

again.  its cheap.  its the only way im going to have a sub.  its this one or no one.  regardless i understand that it wont go under the seat.  im better about that, yes, but im just gonna rethink as to where to put the thing. 

thanks for the help.

What type of car are we talking about here. It might help us help you if we knew the vehicle make.

Chris

96 escourt hatchback + 10" sony sub

i cant get it under the front seat, thats clear now, and so now im just conpemplating if i want the trouble.  i dont like the idea of having it in my trunk.  i use it too much.  it would have to be some where along the back wall or something.  either way.. im just gonna figure out where i want it now and tackle it from there.

again, thanks for the help