How To Mount Sub Woofer Under Seat Jeep Convert A Tube Subwoofer Into A Under-seat Sub?

Convert a tube subwoofer into a under-seat sub? - how to mount sub woofer under seat jeep

Hello people.
I recently purchased a 6 "subwoofer tube outside of eBay. (Low)
The volume is not great, but I do not want a huge sound of the beat, just sound fuller. (That the Sub-Committee looks correct).

The subcommittee has a built-in amplifier and all, but I recently met with submarines as the seat http://www.jaycar.com.au/products_uploaded/productLarge_10622.jpg

Is it possible (or equivalent) to remove the tube, the construction and assembly of the box under the seat?

Sounds can this be? For example, it has sufficient space and air.

Would it be better to mount the speakers vertically or a kind of flat tube with the speaker in a corner.

The reason why I am under the seat, how is that you usually passengers, and is currently located on the floor behind the driver's seat.

Thanks