“Final words
iPurifier: it doesn’t matter what DAC you have ipurifier does the job……inexpensive but very reasonable and effective upgrade
Gemini: very high quality USB cable, you can hear the enormous differences right away. I know it is hard to believe usb cable can make a huge difference but believe me Gemini has that power…..if it is pricey for you you should try the mercury cable.
iUSB3.0: tested with 3 different DAC’s ( iFi Nano DSD, Goldnote DAC7 ve Matrix X-Sabre ) and heard the same effect on all. To be honest iFi Nano was the cheapest one but with the iUSB 3.0 it became a totally different unit. This unit might be pricey for entry level DAC users but if you are looking for best USB solution this it it.”
Thanks Hakancez and stereomecmuasi.com!
http://stereomecmuasi.com/2015/12/ifi-audio-ipurifier-iusb3-0-ve-gemini.html