The base is connected by a 3.5mm to RCA cable, but the head phones themselves are wireless, the base is what feeds the phones the 5.1 surround. And I believe the device is Realtek HD Audio, yes I have the volume up on the head set its self also, and no I don't have a 360 anymore to test them out; For some reason when I play music or movies in VLC or Media Player classic is much much louder, but can't get that same strength when listening to music (unless I use those two media players)