xBox 360 and multiple headphones
Q:  If 10 xbox 360's were being played at once in a large room, the sound
    created by four users on each system would be maddening.  How many Ear 
    Force x1's, x2's, and x3's can be hooked up to a single xbox 360? Can 16
    x3's function simultaneously in the same room if 4 xbox 360's were linked 
    together system link?  Could they function if 16 xbox 360's were linked 
    together simultaneously?

A:  What you wish to achieve is pretty complicated. You cannot use any of 
    the wireless Headphones (X-2, X-3) because due to the nature of wireless 
    technology they will interfere with each other. You should be able to use
    the Wired X-1. However, since the Xbox has only 3 USB ports, you would
    need a USB Hub to increase the USB Ports. Also, since the Xbox has only 
    one audio output, you would need one splitter for each X-1. 
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