Kingrex UD384 User manual

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KingRex UD384 (32bit/384Khz) USB DAC
USER MANUAL
Edition V.2 (revised date 2011/10/17)
KingRex Technology Co., LTD
www.kingrex.com
[e-mail]

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TABLE OF CONTENT
Table of content…………………………………………………………………………………………………….…P.2
Contents of KingRex UD384 USB DAC package………………………………………………..….P.3
Safety instruction……………………………………………………………………………………………P.4 ~P.6
Warning
Important safety instruction
Safety caution
Product feature……………………………………………………………………………………………………..P.7
Specification………………………………………………………………………………………………………….P.8
Analog output
S/PDIF digital output
Operation environment presentation……………………………………………………………P.9-P.10
Front panel details & rear panel details
DC jack
Power indicated LED light
USB port
Analog output (RCA RIGHT)
Analog output (RCA LEFT)
Digital output (S/PDIF)
Connection to the host………………………………………………………………………………………….P.11
Technical information………………………………………………………………………………..………….P.12
Working environment suggestion
Suggested software for UD384
Driver installation……………………………………………………………………………………….…P13-P.16
Obtaining the driver
Installing the driver on a Windows OS-based PC
Installing the driver on a Mac
Configuring the computer to UC384 USB DAC package
Configuring a PC with Windows XP
Configuring a PC with Vista or Win7
Configuring a Mac audio output devices
Configuring for Windows XP, Vista, or Win 7
Configuring ASIO output for windows system
Configuring the player for WASAPI or ASIO output support Foobar 2000
…………………………………………………………………………………………….………………………………P.17-P.23
Maintenance
Burn in
Service
Our best wishes
……………………………………………………………………………………………………………………………………P.24

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1. CONTENTS OF KINGREX UD384 USB DIGITAL TO ANALOGUE
CONVERTER
UD384 USB DIGITAL TO ANALOGUE CONVERTER *1
DC 7.5V global switching power adaptor *1
USB cable *1
USB FLASH 8G *1
(included user manual, demo high res playback, and driver,
firmware update DFU tool…)
Warranty card *1

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2. SAFETY INSTRUCTION
i.Warning!
Changes or modifications not authorized by the manufacturer can invalidate the
compliance CE regulations and cause the unit to be no more suitable use. The
manufacturer refuses every responsibility regarding damages to people or things
due to the sue of a unit which has been subject to unauthorized modifications or to
misuse or to malfunction of a unit which has been subject to unauthorized
modifications.
ii.Important safety instructions!
Thank you for choose KINGREX UD384 USB digital to analog. We sincerely hope you
could keep the user manual for whole KingRex UD384 USB DAC lifetime, it provides
you with better protection for connected equipment.
Please read this user manual very carefully. It provides safety, installation, and
operating instructions that will help you derive the overall performance and fully
extend the life that the UD384 USB DAC has to offer.
Please save this manual! It includes important instructions for the safely use UD384
and for obtaining factory service should the proper operation of the UD384 come
into question.
Please save or recycle the packaging materials! The UD384 shipping materials were
designing with great care to provide protection from transportation related damage.
These materials are invaluable if you ever have to return the UD384 for service.
Damage sustained during transit is not covered under the warranty.
iii.Safety caution!
The following precaution should be observed when working on the power supply
unit:
-Remove watches, rings or other metal objects.
!!! Caution: Risk of electric shock, do not remove cover. No user serviceable parts
inside, Refer servicing to qualified service personnel.
!!! Warning: To reduce the risk of fire or electric shock, install in temperature and
humidity controlled indoor area of conductive contaminants.

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-Read the user manual and familiarize yourself with the functions before you
attempt to use this equipment.
-To prevent fire or shock hazard, do not expose this appliance to rain or moisture.
-Do not dispose of in fire to prevent injury or burns. Also do not place the units near
the heat sources such as radiator, heat registers, stoves, or other devices (including
amplifiers) that produce heat.
-Do not disassemble the machine with power on. If you do, you may receive an
electric shock.
-Do not set these units near the water near following area: bathtub, washbowl,
kitchen sink, laundry tub, wet basement, or swimming pool.
-Do not place heavy objects on the power cord. If the cord is damaged, fire, or
electrical shock may result. In particular, it is possible that one might accidentally
place a heavy object on a carpet that covers the cord; definitely avoid these
situations!
-Do not install the UD384 USB DAC in a place where it might be exposed to oil,
smoke or steam (for example, near a cooking table or humidifier). Otherwise, fire or
electrical shock may result.
-Do not place the power cord near a heating device. Otherwise, the cord sheath may
melt, resulting in fire or electrical shock.
-Obstruct the necessary all- around ventilation: especially DO NOT place the set
close to curtains or on soft furnishing such as carpets. Overheating can cause
unnecessary damage and shorten the lifespan of the equipment.
-No user serviceable parts inside. Refer servicing to qualified technician. Never
remove the cover unless qualified to do so. This unit contains dangerous voltage.
-When you remove the power plug, be sure to hold the plug. Never pull on the cord.
Otherwise, the power cord may become damaged, resulting in fire or electrical
shock.
-Do not attempt to modify this equipment. Otherwise, fire or electrical shock may
result. Warranty is void on modified devices.

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-Do not damage, process, bend, twist, stretch or heat the power cable. If the cord is
damaged, fire or electrical shock may result.
-When you are connecting other audio devices to the UD384 USB DAC make sure
that you first turn off the power to all devices to be connected. Refer to the user’s
guide for each device and use the specific cable for the connection.
-If you plan not to use the UD384 USB DAC for a long period of time (such as when
you are on vacation), remove the power plug from the AC outlet. Otherwise, a fire
could possibly result.
-If any abnormality occurs while suing the UD384 USB DAC, remove the plug from
the AC outlet. In this case first shut off the power amplifier or turn down the volume
controls and so on to avoid possibly damaging transients.
- If you notice any abnormality- such as smoke, smell, noise, etc. –remove the plug
from the AC outlet. Confirm that the abnormality is no longer present, then consult
your dealer for repair. If you continue using the UD384 USB DAC under abnormal
condition, fire or electrical shock might result.
- If a foreign object or water enters inside the equipment, remove the plug from the
AC outlet and consult your dealer for repair. If you continue using the UD384 USB
DAC under this condition, fire or electrical shock may result.
- If the power cord is damaged(for example if it is cut or if the core wire is exposed),
ask your dealer for a replacement. If you continue suing the UD384 USB DAC under
this condition, fire or electrical shock might result.

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3. Product feature:
KingRex UD384 is a high-quality USB DAC for CAT users or PC HiEnd lovers
those wishing to stream high-resolution playbacks. The UD384 can direct stream
from PC or Mac at 16bit/44.1KHz to 32bit/384KHz through analog output –RCA &
digital S/PDIF output. The UD384 is running in asynchronous mode for best performance.
The master clock generator is a classy 1ppm TXCO unit with proprietary low-jitter
drivers for Windows & Mac. Direct Sound, ASIO4ALL, and WASAPI are all supported
and run smoothly. The UD384 is housed in an oval cross-section aluminum case with
black hairbrush polish. It measures 88*82*24mm. “The UD384 ships with Windows
& Mac drivers that need to be installed on your computer. An external 7.5V power
supply is provided.
P.S. Mac OS do not need to install driver!

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4. Specification:
USB interface :
-USB 2.0 High/Full Speed compliant
-USB Audio Device Class Specification v1.0/2.0 Compliant
Analog output:
- Sample Rates Supported:44.1Khz, 48Khz, 88.2Khz, 96Khz, 176.4Khz, 192Khz, and
384Khz.
- 16, 24 bit & 32bit 2 Channel
Digital output (S/PIDF):
-1 Stereo SPDIF output through Integrated IEC958 Line Driver
16, & 24 bit 2 Channel
-Sample rates support : 44.1Khz, 48Khz, 88.2Khz, 96Khz, 176.4Khz& 192Khz.
Power
Power demand : 7.5V DC
S/PDIF output voltage: 2.5Vpp
AES/EBU output voltage: 2.5 Vpp
Power consumption : 200mA @7.5V

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5. Operation environment presentation
Front panel details & rear panel details
(Figure 1)
1. DC JACK: FOR 7.5V power input – Apply a voltage in DC7.5V. Tip is positive,
ring is negative. This input is protected against polarity inversion. 2.1mm tip jack
supply connector.
2. Power instruction LED light - Power indicated LED. After connected power,
the power indicated LED light will be glow. If the LED light is dim, please
exchange your 7.5V switching power supply or contact with your local distributor
& dealer for after service.
3. USB port for PC signal input –Connect to host w/ a suitable 2.0 USB cable.
Female “B” USB connector.

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(Figure 2)
4. S/PDIF : RCA – Connect to DAC or receiver with a coaxial digital cable
terminated with RCA male plugs. This output is galvanically isolated by a pulse
transformer. Gold plated RCA female connector.
5. Analog output RCA Left channel– Please connect with your interconnect cable
in left channel
6. Analog output RCA Right channel– Please connect with your interconnect
cable in Right channel
P.S. Digital output only able to output not over than 24bit / 192Khz.
CAUTION : THE DIGITAL & ANALOG OUTPUT CAN BE USED AT THE SAME TIME.
BUT THE DIGITAL OUTPUT CAN ONLY SUPPORT THE MAXINUM OUTPUT IN
24BIT/192KHZ IN UD384 ONLY! PLEASE NOTED.

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6. Connection to the host
Connect the USB ”B” plug of a 2.0 USB A-B cable to the USB connector (Figure 1, 3)
of UC384.
Connect the USB-A plug of the cable to a 2.0 USB port of your computer.
Connect a power supply connector (7.5V switching adaptor) of UD384. The power
indicator will lit.
Please install the driver while you use Windows OS based PC. Mac Os 10.6 fully
supported.
NOTE: If you want to avoid the automatic driver installation, please connect to the
computer after manually installing the driver.

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7. Technical infos:
KingRex UD384 is high quality asynchronous USB DAC. With highly flexible firmware
upgrade DFU tool. It will be freely exchange the transferring mode from Asynchronous
to synchronous and vice versa.
Working environment suggestion:
OS:
Windows: XP, Vista, and Win7
Mac : 10.5/ 10.6 /10.7 (SOME OLD MAC COMPUTER ONLY USB1.0
INTERFACE,SO IT ONLY ABOUT TO OUTPUT 44.1K IIS OUTPUT TO UC192)
P.S. In most of condition,Mac 10.3 will still workable with KingRex UD384. But in some
setting, the computer will has internal conflict to be work with UD384. Our suggestion
will be updated OS system at first! Most of problem will be solved after renew OS system
to Mac 10.6.
Suggested software while using UD384 :
Foobar 2000 V1.1 (http://www.foobar2000.org/download )
ASIO component : WASAPI output
support (http://www.foobar2000.org/components/view/foo_out_wasapi )

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8. Instruction for how to operate the UD384
Driver installation
Obtaining the driver
The drivers for UD384 are available on the CD-Rom.
Installing the driver on a Windows-based PC
1. Automatic (guided) installation.
Apply power to UD384 and connect it to the PC. Following the negotiation process, open
the driver folder select “SETUP(SETUP LUNCHER) the driver installation wizard is
automatically proceed as in Figure 4.
(Figure 4)

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2. Click on the button to proceed. A window apprears as show in Figure 5:
(Figure 5)
3. Click on the blank space. Press “Next” for next step.
(Figure 6)

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4. Choose “Continue Anyway”(as recommended) and proceed to next step.
The windows shown in figure7 will show.
(Figure 7)
5. Please press “Next” and go on next window.
(Figure 8)

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6. Click on Continue. The installation will proceed to the end. The window is
shown in figure 9. Click on Finish to complete the driver installation.
(Figure 9)
NOTE: the wizard appearance and the guided installation procedure may slightly vary
from XP to Vista to Windsows 7.
Manually uninstalling the driver on a Windows-based PC
Connect UD384 to the PC.
Go to the control panel and launch the “System” utility, then select Hardware tab. Open
the peripheral management window (see figure XX).
You will find UD384 listed under Audio, Video, and Game controllers.
Installing the driver on a Mac
As Mac OS will automatic install the driver ( No more extra driver to be needed)!

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9. Configuring the computer to UD384
Configuring a PC with Windows XP
A PC with Windows XP can use UD384 in two different ways: Direct Sound (DS) and
ASIO4ALL.
Configuring a PC with Windows Vista or Win7
A PC with Windows Vista or Win7 can use UD384 in two different way: Direct Sound (DS),
ASIO4ALL, and WASAPI. DS is suitable for players which cannot operate WASAPI or for
Internet streaming. WASAPI(Windows Audio Standard API) is a standard interface for
audio players which allows to get the same performance of KS with application which
cannot operate in KS mode, at the cost of higher CPU load.
Configuring a Mac audio output devices
Go to system preference and select sounds. The following windows as shown, please
select UD384 and open the “AUDIO MIDI SETUP” for output sampling rate/bits rate
select for output as indicated Figure 10
(Figure 10)

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(Figure 11)

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Configuring for Windows XP, Vista, or Win7
Open control Panel and select Hardware and Sounds. Under Audio, click to open the
Manage Audio Devices window which will show KingRex UD384.
(Figure 12)
Open control panel and select hardware and sounds. Please go the path foobar
2000-> File->Preference->ASIO Virtual Device Editior-> ASIO4ALL control panel->
KingRex UD384.

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As happens with ASIO4ALL, press the “configure” button setup the ASIO virtual devices.
(Figure 12)
Configuring ASIO output for Windows system
Go to system preference and select sounds. The following windows as shown, please
select UD384 for output as indicated Figure 13.
(Figure 13)
Configuring the player for WASAPI or ASIO output support under
FooBar 2000 player