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KingRex UD384 USB Dac

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The new KingRex UD384 is by far the best value in the USB DAC category.

Moon Audio gives the KingRex UD384 a BIG Thumbs Up!

It has the ability to decode via USB not only bit rates up to 24bit and sample rates up to 192kHz but it can also with the help of a few software programs play DFF SACD files from your computer.

Also, soon via a driver update, 32bit/352.8kHz will be available on the KingRex UD384.   All that for $499!  Amazing!

The New KingRex UD 384 can also be used as a USB to Coax SPDIF interface to send digital to your uber high end DAC!  However, it will not spit out SACD via the Coax SPDIF output. And it is limited to the 24bit-192kHz at the SPDIF output.

Can also be used in unison with an Apple Camera Connection kit to connect to your Apple iPad.

Moon Audio is the US Distributor for KingRex Products and Dealer inquiries are welcome. Review

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With the new UD384, KingRex has not only redefined high definition audio with never before affordability but further broadened its performance level. The micro aluminum extrusion chassis encompasses two devices: a USB DDC to stream digital signals to legacy DAC through coaxial S/PDIF output up to 24bit/192kHz and a USB DAC to process true HD music files into ultra high resolution stereo analog signals up to 32bit/ 384kHz. The UD384 accepts 16bit/44.1kHz to 32bit/384kHz data and operates in asynchronous mode. Its low-jitter 1ppm TCXO supersedes the PC or Mac host as the master clock, resulting in bit-perfect transfer and huge sonic improvement. The KingRex U-Power smart-charge battery power supply is further recommended for completely off-the-grid and noise-free operation.

We recommend using Foobar or JRiver Media Center software with the UD384. The UD384 will come with both drives for Windows and Mac on a USB key. Kingrex also provides a few smaples of music in different resolutions to compare. Suggested media player plug-ins: Windows XP - foobar 2000 + ASIO4ALL; Windows Vista/ Win 7- foobar 2000+WASAPI; MAC - iTunes + Pure Music or Amarra. Please note that the UD384 cannot accept 352.8kHz playback. We suggest you try 24/192 first. Kingrex is working with to get native 32bit/384kHz playback. Software updates are provide for future resolution upgrades. We will post upgrades on this page as they become available.

Also available for the UD384 are 2 upgrade power supply options. The Upower and the PSU MKii. These add another level of transperancy and resoulution.

Windows Driver

No driver required for Mac.


Additional Info

Instructions for Streaming SACD .dff files. Here


Windows 8 Driver



UD384 (32bits/384Khz USB DAC )
Input: USB *1
USB:2.0 high speed
Analog output: RCA *2 (R*1 L*1)
Sampling rate support :44.1Khz, 48Khz, 88.2Khz, 96Khz, 176.4Khz, 192Khz, & 384Khz(*)
Supported bit rate: 16 / 24 /32bit
Digital output :SPDIF *1
Sampling rate support :44.1Khz, 48Khz, 88.2Khz, 96Khz, 176.4Khz, 192Khz
Supported bit rate: 16 / 24 bit
Adaptive Clock Generator for Audio Streaming Synchronization
Asynchronous mode changeable through DFU Tool

Recommended media player:
In Mac OS : iTune (please plus - pure music for sampling rate Auto-change)
In Windows : Foobar 2000
i. Windows XP : please add ASIO4ALL
ii. Windows Vista & Win7 : please plus WASAPI
PC requirement : Dual Core
PC OS requirment: Windows XP, Vista, Win7
Mac requirement: Dual Core i3, i5,i7
Mac OS requirement: 10.5/10.6/10.7

power requirement: 7.5V/250mA
size: 110*82*24mm

Remark: *384Khz for USB DAC only
           ** Spdif output doesn't support 384Khz**


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