This is probably for a few reasons chiefly because it s easiest to wire there but you should know that the nature of the sound coming from a sub mean that it.
Front firing subwoofer on carpet.
I just ordered a pswi 225 down firing wireless sub.
The default position most subwoofers end up in is at the front of the room near the entertainment system.
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.
Also subs have dedicated power on board lessening the strain on your a v.
If the subwoofer is front firing it can be placed on a shelf or in a cabinet.
The same rule of heaviness applies here.
Today in the irc chatroom ericduckman wants to know if putting his down firing subwoofer on carpet is going impede the quality of sound.
Down firing subwoofers are popularly used with surround sound systems to increase the vibrations and rumbles heard and felt during film viewing.
Image by nosferatu it licensed under cc by sa 3 0.
A word of caution for placing subwoofers on tables cabinets or shelves.
Scott wilkinson and chris boylan have an answer.
My family room is fairly small 15 x 12 and carpeted.