Hi Vect,
The WMC-NWH10 interconnect is not meant to connect the ZX1 or F886 to the PHA-2. The WMC-NWH10 cable is meant to interconnect the ZX1 or F886 into other Sony hi-res products like the Sony UDA-1 USB DAC.
For further details, please refer this link (second last post):
http://www.head-fi.org/t/680611/new-sony-high-end-dsd-gear-including-a-usb-dac/90
The PHA-2 mini stock cable (from ZX1/F886 port to the dedicated USB port for the afore mentioned DAPs beside the Digital In) is the main cable to play hi-res audio from the ZX1/F886 through the PHA-2. Please refer picture below.
Nevertheless, a long time ago, I had an issue with my PHA-2 ( around page 100-150 in this thread). To cut the story short, I sent the defective PHA-2 unit back; and today, I got the replacement unit... been non-stop listening to the following trio:
ZX1 > PHA-2 > MDR 1R
Unfortunately, the PHA-2 was not able to drive the LCD-3 to the best of its capabilities. But the above shown Trio is simply amazing (MAX Volume at Normal Gain)...even if the MDR 1R itself is far from being considered high-end pair of headphones. Kudos to Sony on this one.
Cheers
Simon T.