What does the phase switch on my home subwoofer do?
The phase switch allows you to put the subwoofer in phase with the rest of your speakers in your Home Theater system.
Do to the acoustic properties of bass frequencies, and placement of the subwoofer, you may need to reverse the polarity of the subwoofer. If the subwoofer is out of phase with the speaker system, bass frequencies will cancel each other. This will result in an overall decreased bass response.
The best way to set the phase switch is to have someone move the switch while you are in your normal listening position. Leave the switch in the position that sounds best.