I use the Ultrasone Signature Pro with a Fostex HP-P1 together with an iPod touch. I am very satisfied. I own the E17 too, but I have not used it with the USP.   Bruno

My Signature Pro did arrive today. I use it with a Fostex HP-P1 connected to my iPad or iPod. The sound is fantastic. I usually listen with HD650.   Bruno

The iTunes store does not sell 96/24 music. iTunes can play it.   Bruno

I do not need a powered USB Hub. The USB to SPDIF converter (Matrix) does not need one.   I know how to handle 96/24 files. My solution is working.   Bruno

No, nothing, USB powered and not powered. Bruno  

Another finding. I often use my ipad to listen to my music which is stored on my Mac mini. I connect via the app 'Music' to iTunes over wlan. Itunes is able to store music in 24/96. I can play these files with E17, it shows 96 kHz 24 bit. Bruno

Quote:   Hallo Ian,   1. Yes 2. Flac Player, Dan Leehr L.L.C. 3. 96kHz 24 bit   The Matrix has a female RCA connector.   Bruno

Hy all,   I have success by connecting my Ipad (3) with the FiiO E17 via Matrix Audio USB-DDC. I sounds great. You only need one coax cable.     Here is the link to the shop where I bought it: http://www.amazon.com/gp/product/B0084ZTTVO/ref=oh_details_o00_s00_i00   ciao Bruno

Quote: Did You already hear the UHA-6S with camera kit and USB? Any impressions? best regard Bruno

I built up JLH's balanced discrete amp. I did combine it with a natural cross feed. It sounds great with my new Senn HD650. I used some old BC414/416, polypropylene caps und Panasonic OS-Cons. It is worth to try this little circuit. The only problem is to obtain the low resistance pot (4,7k)...