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, () - PCPartPicker
Mini sound card under test: EPOS│SENNHEISER GSX 300
EPOS Sennheiser Audio GSX 300 Gaming Series External USB Sound Card (Black) | eBay
EPOS I SENNHEISER GSX 300 USB 2.0 Snow Edition Sound Card│24-bit│96 kHz│White | eBay
External EPOS Game sound card with built-in Sennheiser GSX 300 USB 7.1 amplifier - AliExpress