Amazon.com: SENNHEISER PC 373D - 7.1 Surround Sound Gaming Headset : Video Games
EPOS I SENNHEISER GSP 370 Headset 7.1 channel full size Bluetooth wireless black - Office Depot
Sennheiser's PC 373D Dolby 7.1 gaming headphones sound best with it disabled | TechCrunch
Sennheiser's GSX 1000 7.1 USB DAC; audio the way it wants to play - PC Perspective
EPOS SENNHEISER GSX 300 External USB Sound Card 7.1 Sound Channels External USB 2.0 3 Byte 96 kHz Maximum Playback Sampling Rate 1 x Number of Microphone Ports 1 x Number of Headphone Ports - Office Depot