KingRex UD-01 Pro

The two words on everybody's lips these days seem to be audio and computer, not necessarily in that order. Now that hard drives have gotten big enough not to be an issue for music storage, life seems much easier for audiophiles to mix high quality audio and computers. It will be a trend for audiophiles (perhaps all music lovers!) to update their CD players to the PC Hi-Fi.
Various options exists, from the crude exercise of running a 3.5mm mini-jack to RCA cable from a PC soundcard to the amplifier’s auxiliary input, to fancy networked internet radio, or external USB DAC devices.
The USB DAC device should be the most popular choice for most users as it has two advantages that no one would deny.

1. Convenience - as USB ports can be found on almost any computer, and using USB is as simple as it gets
2. Reduce the noise levels found inside computers

The second point is the most important, as it's the main reason for Hi-Fi enthusiasts to reject using the computer as a source. The combination of high ripple noise, high frequency radiation, jitter and unstable voltage outputs can cause havok with any Hi-Fi system. So by using a USB DAC, the important circuitry is located externally from the computer and therefore will reduce most noise issues.
The UD-01 Pro is KingRex's upgrade on the current popular UD-01 design. The main DAC chip remains as the BurrBrown PCM2702E, it provides dual-channel storage for high internal buffer. The UD-01 Pro also features a low-pass filter and DC servo designed by KingRex's dedicated engineering team. Other upgrades on the UD-01 Pro include the integrated linear power, which replaces the standard switch mode design, and a 1ppm TCXO clock.


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