EPOS (SENNHEISER) Gaming PC Audio Amplifier GSX 1000 2nd Edition This is an audio amplifier from EPOS (Sennheiser's gaming brand). I've used it for about a year and a half. I was also busy with work, so I didn't use it for very long each time. In my amateur opinion, it's clean with no noticeable scratches or stains, and there are no problems with any of the functions. Please understand that this is a used item before purchasing. A USB cable is included. The box is not included.