Amazon.com: EPOS I Sennheiser GSX 300, Gaming Dac/External Sound Card with 7:1 Surround, High Resolution Audio EQ presets for Gaming, Movies and Music - Audio Gaming Amplifier for PC and MAC Compatible,
EPOS│SENNHEISER GSX 300 Review - MEF TECH
Mini sound card under test: EPOS│SENNHEISER GSX 300
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
GSX 300 from EPOS | One small device for a huge step-up in audio
EPOS Sennheiser GSX 300 Review | Novastream
EPOS|Sennheiser GSX 300 External USB Sound Card (updated for confusing corporate reasons) - GadgetGuy