This makes no sense.
The connection between the PP device and the computer as I understand it is just the data path. That will be bit perfect with or without the Vaunix. In other words, you typically use the the Brick to provide clean power in scenarios where the DAC circuitry is relying on inherit noisy power supplied by the host's USB ports.
That is not the case with the PP unit attached to the AP2.
From the site:
"Every Audiophilleo USB-S/PDIF transport contains two independent modules:
Module1: ARM RISC processor and USB interface, powered by the computer
Module2: Ultra-low jitter clocks and S/PDIF output stage, powered by the PurePower
Module2 is galvanically isolated from Module1. Ground and power are completely separate so that no noise creeps from the PC to your DAC. The PurePower physically disconnects itself from the USB bus so that it makes zero contribution to the power noise in Module2 and your DAC. "
I just don't believe the Vaunix or KingRex cables will have any audible effect on the final output stage based on the above. Granted, my understanding of this device maybe off, but I need to understand why something like the Vaunix would a) make a difference and b) make a night and day difference.
I truly am confuzzled...I just asked Phillip to verify my understanding of the unit...anyone got a Lab Brick I could borrow?