Best Buy: Sennheiser Headphone Amplifier Black GSX 1000
GSX 1000 2nd edition
User manual Sennheiser GSX 1000 (English - 32 pages)
Amazon.com: EPOS GSX 1000 2nd Edition Dac Amp Audio Amplifier/External USB Sound Card with 7.1 Surround Sound, Side Tone, Gaming DAC and EQ, Headphone Amp Compatible with Windows, Mac, Laptops and Desktops :
EPOS | Sennheiser GSX 1000 Gaming Audio Amplifier / External Sound Card, with 7.1 Surround Sound, Side
Sennheiser GSX 1000 DAC & Amp Review – Eargasm – WGB, Home of AWESOME Reviews
Amazon.com: EPOS 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. (Renewed) : Video Games