“Pros:Inky black background to music, increased depth and width of soundstage, more natural note decay, can charge several devices at once at a fast rate”
“When I received the iFi iUSB3.0, I immediately tested it out with my favourite test track: Katherine Bryan – Flute Concerto Alla Marcia……The track has a lot of stage depth and width, extreme differences in pitch, big tympani strikes, and incredibly fast well-defined flute notes that are a perfect torture test for seeing if you’ve got a treble emphasized piece of equipment……The iUSB3.0 adds significant soundstage depth on my Sennheiser HD600 headphones, and a little bit of extra width. Drum strikes were noticeably more rounded and defined, the instruments were suspended in the aether with precise locations……Overall, I’m very impressed with this little wonder. It boosted DAC function on DACs ranging between $300 and $3000 in price. I’m very happy to have it in my system and stopped doing comparisons pretty quick–the difference was that noticeable.”
Thanks Glassmonkey!
http://www.head-fi.org/products/ifi-micro-iusb3-0/reviews/14328