A subwoofer produces sound only at the low end of the sound spectrum, typically under 200 Hz.  On its own, the sound will be bass-y, but when connected to satellite speakers, the non-directional low end bass will complete the sound experience.  We recommend using the subwoofer as the HOST speaker device when in Stadium Mode.
Placement:  A subwoofer is ideally placed on the floor, along a wall or hard surface, and at the edge of a listening environment.
Adjusting the volume: Balancing the sound to suit your personal preference is done by adjusting the volume of the subwoofer relative to the speakers.  We recommend turning the subwoofer down 10-20% lower than the volume of the speaker by tapping the volume controls on the subwoofer; then slowly increasing it as you evaluate the experience.