Audiophilleo’s PurePower ULN (ultra low noise) Digital Power Pack is an optional battery based power supply for the Audiophilleo1 MKII and Audiophilleo2 MKII transports and transforms our reference-grade transports to deliver new levels of sonic realism, presence, soundstaging and dynamics. From entry-level gear to high-end systems, audio enthusiasts everywhere will appreciate how PurePower makes the background grit and grunge disappear, imparting and analog-like sound that lets the music carry you away. Just have a look at the reviews - the PurePower makes an impact bigger than any cables or alternative power supplies do.
Much of what you don’t like about “digital” ultimately relates to electromagnetic noise in all its various forms. Computers, appliances, mobile phones, TVs—just about everything in the modern world that runs on electricity—create an abundance of random and patterned noise. This electronic “hash” travels through the air, household and system wiring to wreak havoc on even the best audio electronics. Noise gremlins are everywhere, making life difficult for sensitive clocks, DACs, and analog circuits. The PurePower provides the ultimate in clean power to those ciscuits that matter: the output stage and clocks. It makes Audiophilleo1 MKII and Audiophilleo2 MKII sound quality highly independent of computer source and USB cable used. Don't invest in partial solutions like expensive USB cables or PCI USB cards. The PurePower is THE solution to get the absolute best sound from any computer.
All existing Audiophilleo1 MKII and Audiophilleo2 MKII units can be upgraded with the PurePower option. Note that units have to be sent back to Audiophilleo for the PurePower upgrade because it involves considerable internal changes. Also new units may be ordered with the PurePower option already included. Either way, the Audiophilleo 1 and 2 units are modified with an additional power connector which feeds the SPDIF output stage from the PurePower. This modification requires that this power connector is fed with 3.3V to 5V, so the PurePower will be required for normal operation. In return, absolutely no high frequency noise from your PC can make it into your DAC because there is no electrical connection between the two.