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.
For decoupling vibration pads can be placed beneath the shelf or cabinet so that minimum sound vibrations are transferred to the floor.
Scott wilkinson and chris boylan have an answer.
Image by nosferatu it licensed under cc by sa 3 0.
The default position most subwoofers end up in is at the front of the room near the entertainment system.
The same rule of heaviness applies here.
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.
A down firing subwoofer means that instead of a side fire or front fire the sub emits the sound directly onto the floor surface.
Today in the irc chatroom ericduckman wants to know if putting his down firing subwoofer on carpet is going impede the quality of sound.
A word of caution for placing subwoofers on tables cabinets or shelves.
Subwoofers are less obtrusive than the sort of floor standing speakers with drivers big enough to pull off the same task.
If the subwoofer is front firing it can be placed on a shelf or in a cabinet.
Down firing subwoofers are popularly used with surround sound systems to increase the vibrations and rumbles heard and felt during film viewing.