That is a free air sub install, only do if you have a sub made for free air, probably the flap at the bottom will rattle around.

I have a mb quart 1200 X2 ab amplifier powering 2 skar 8" vvx subs in a sealed box and I get no rattles, with it turned up and loaded a frequency test, and outside the silverfox.

Depends on what you are looking for for sound, just to hear the lows clear, want the feel or wanting massive air movement.

I just finished up my componets this evening will post on another thread.

I do alot of driving and like listening to my slacker and wanted to hear all frequencies clearly, and if I get tired give more to the subs and keep me awake.

With the box I still have room for all my luggage and can't see the luggage in the rear view mirror.