I have plugged in my Fiio E17K in Windows 10 HP Laptop after like 3-4 years. When plugged into USB, Windows recognizes it as "Fiio USB DAC E17K", and also the light changes color to purple on the device but in Windows Output Audio devices it is not showing rather it is coming under "Other...

Hi , new member here . I have an e17k and recently bought a pair of se215s and i get a lot of hissing noise even when nothing is playing (on zero gain) Now the noise with my phone or ipad is way less than this . Are all e17k's bad with iems or should i return this unit ?