While the Command bar decodes Dolby Digital and DTS, the bar does not support the addition of wireless rear speakers. The Command bar simulates rear surround channels creating an imersive, easy to use home theater experience.
The Command Bar uses all 5 channels of sound to create a large soundstage with detailed images that fill the room. Because it does not have rear surround speakers, it cannot reproduce the same sound as a traditional 5.1 speaker system. Hence, it provides a virtualized surround sound. Most sounds you hear from behind you will be due to wall reflections and other pycho-acoustic effects.