In a 5.1 channel surround sound speaker system, the .1 subwoofer has the all-important job of reproducing all the deepest low frequency bass that's not being handled by the other five speakers.

Blending one or more subwoofers (imagine setting up a .2, .3, or .4 system featuring two to four separate subs) with the rest of the surround sound speakers adds considerable IMPACT to your movie watching and EMOTION your music listening experience -- that you can both HEAR and FEEL!

Most floor standing subwoofers are active, meaning they have their own internal amplifier built-into the subwoofer cabinet.

Don't forget to also buy a good quality subwoofer cable to connect it to the .1 LFE sub output on back of your surround sound receiver.