5.1 vs 7.1 Speaker Systems-Which is best for you?
 Almost all of today's better audio/video receivers are capable of powering 7 or more discrete channels of audio. The ".1" after the 5 or 7 indicates the number of subwoofers. For example, a 7.2 receiver supports 7 discrete channels of audio and 2 subwoofers. So, the question is, do you need a 7.1 speaker system