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Amazon.com: EPOS | Sennheiser GSX 1000 Gaming Audio Amplifier / External Sound Card, with 7.1 Surround Sound, Side Tone, Gaming DAC and EQ, Headphone amp Compatible with Windows, Mac, Laptops and Desktops. : Everything Else
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EPOS|Sennheiser GSX 300 External USB Sound Card (updated for confusing corporate reasons) - GadgetGuy
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