It sounds like you are using these in conjunction with a console, not a desktop PC, can you clarify?
These headphones are designed for use with the Xbox 360, and the default connection is via the USB port on the back of the Xbox, although adapters for PC and PS3 are sold separately
. The default USB port may work with a PC, but YMMV.
Source - User Manual for the X32: »www.turtlebeach.com/assets/produ ··· 8-11.pdf--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.