German audio brand Sennheiser took the opportunity to launch an entirely new range of gaming headphones at Gamescom this year, designed for players that want to block out the outside world entirely. With aviation-grade acoustic sealing, the new GSP 300 headset will work on PC and Mac, as well as PS4 and Xbox One, and it's joined by two new standalone audio amplifiers that promise the best possible sound sound quality -- both stereo and surround -- during gaming.