Down Firing Car Sub Into Carpet

I m really just looking for confirmation that my assumptions are correct.

Down firing car sub into carpet.

The advantages i saw to down firing was getting the woofer away from my ear the cone was about 15 away when it was direct firing. Of course every install is different but i would have to question the benefit of down firing when used in a car trunk setup. Today in the irc chatroom ericduckman wants to know if putting his down firing subwoofer on carpet is going impede the quality of sound. Scott wilkinson and chris boylan have an answer.

I have recently built a center console for a f 350 with 4 8 focal utopia be subs firing down with slot ports firing forward into the dash. The floor is carpet on carpet pad on cement foundation. I just ordered a pswi 225 down firing wireless sub. A down firing subwoofer box produces a domino effect if placed inside a room.

Find out in this video. How do you get perfect carpet seams when wrapping a subwoofer box with carpet. Since the floors connect to the walls they re also going to shake. You also have to leave 1 4 to 1 3 of the cones diameter for clearance other wise you will run into cancellation issues.

The domino effect starts because of the shaking of the subwoofer box. After that the ceiling comes next. My family room is fairly small 15 x 12 and carpeted. This trick works not only for wrapping a sub enclosure.

Is it worth the time to cut out a small 13 x 13 piece of plywood to sit the subwoofer on to increase bass rather than just have it sitting directly on the carpet. Thanks for any help.