USB D/A Converter: KingRex UD 384

USB D/A Converter: KingRex UD 384

Despite a small housing and also a small budget, the KingRex UD 384 (from 450 euros) has the ambition to help computers to large sound.

  1. USB D/A Converter: KingRex UD 384
  2. Data sheet

Thanks to iTunes comfort and high resolution sound canned, outboard DACs come with USB port for computer audio just difficult in fashion. This has not escaped the relevant manufacturers of chip. So some of them – offer, for example, VIA – already future-proof USB-controller devices that handle audio data rates up to 32-bit 384 kHz sampling rate.

There is called to act to secure competitive advantages in such fast-moving times for computer-DAC oriented audio manufacturers not only quickly, but also discreet. Both succeeded the Taiwanese supplier KingRex: with which he offers UD 384 not only also he let one of the outboard DACs with high data rate above – when the USB controller device remove the caption so that it must do its work incognito. And of course in the much advertised asynchronous USB mode, which according to D/A converter cycles for better jitter suppression the computer.

The Board of the UD 384 (left) quite clearly is. The very right end of the bar 12 megahertz time base is clearly visible on the silver cover immediately in the D/A-converter chip. Right of the picture the mobile power supply UPower: central element is the lithium-ion battery.

Consequently, KingRex has made the following D/A-converter chip also defaced. So much secrecy would have been but not necessary because several marketable D/A converter chips, bypassing their built-in digital filters at 384-kilohertz clock control.

But still no sound makes a high clock and data rate alone. For example, a more stable system clock, equally important is what counteracts sound truebendem jitter. For this reason, KingRex the UD 384 was giving a high-precision 12-MHz quartz oscillator which is also immediately placed at the converter module. This again benefits the jitter performance.

An interesting feature in the UD 384 is his S/P-DIF output, which provides access to the USB world even older D/A converters. This is fed as the manual describes – digital-to-digital converter (DDC) by a -, which means probably the USB controller. S/P-DIF output buffered audio data up to maximum 24-bit 192 kHz available are hereby.

Before listening to music plug -and-play is announced first: Mac fans can turn plug the UD 384 simply, what is true only for OS 10.6 – on 10.5 played 96-kilohertz music the converter an octave lower at half speed. Windows users, however, have can opt to do more, but also between asynchronous and normal USB operation : the latter plays the UD 384 even under Windows XP. The manual explains the installation procedure not so bad – but only in English.

Then you can look forward but on the reward. So the small King played given his price surprisingly supple and musically coherent. Compared with the Arcam rDAC, he made somewhat less pressure in the basement of bass, was a track of moving, flowing in the medium frequency range for this. With the Battery pack UPower, his sound was still something more grounded and strong color.

External power supply

Alternatively to the power supply the KingRex is with the enclosed 7.5 volt world power supply unit operate UD 384 also with the external battery power supply UPower. Expensive energy source 200 Euro this has the same housing dimensions such as the converter so that both be easily stacked.

Energy storage the UPower unit used as a 7.5 volt lithium-ion battery with a capacity of 2600 milliamp- hours, what the UD 384 a playing time of more than 12 hours away from the socket allows. Comes in handy: Except for the 7.5 volt output for the UD 384 the UPower has also a USB port with other devices like iPhone & co. operated on the internal rechargeable battery or can be download.

The charging cycle for the lithium-ion battery is monitored by means of timer device and power op amp so that overcharging is not possible. Advantage of battery power is the decoupling of the mains, which helps to suppress sound depressed braid currents in the signal cables.

Kingrex UD-384

Manufacturer Kingrex
Price €450.00
Rating 61.0 points
Test procedure 1.0

Technical data and test results

General
Dimensions (W x H T) HöheTiefe 8,2 x 2,4 x 8.8 cm
Weight 180.0 kg
Facilities/features
Digital volume control
Analog volume control
Remote control
Display sampling rate
Word width display
Digital effects loop
Maximum sampling rate RCA / AES
Maximum sampling rate optical
Maximum USB sample rate 384
USB asynchronous mode USB
Adjustable digital filter characteristics
Number filter options
Have 32 bit / 384 kHz
Inputs CD player
Digital RCA 0
Digital BNC 0
Digital optical 0
Digital ST 0
Digital AES / EBU 0
Digital DSD
I2S 0
USB 1
FireWire 0
Output D/A converter
RCA outputs 1
Outputs XLR stereo 0
Outputs headphone 6, 3 mm 0
Outputs headphone 3.5 mm 0
Digital output to RCA
Optical digital output
Digital output other:
Test result
Short conclusion Extremely compact USB D / A converter with S / P-DIF output. Processed in the asynchronous USB mode high resolution files of up to 32 bit / 384 kHz. sound coherent, fluent. Optimal with optical battery pack.
Sound Absolute top class
Sound points
(maximum 70 points)
61
Sound points preamplifier
Measured values
(maximum 10 points)
9
Practice
(max. 15 points)
6
Valency
(maximum 10 points)
7
Overall rating
(max. 120
83 very good
Price / performance outstanding
tested in issue: 1 / 12

 

Gallery

USB-D/A-Wandler: KingRex UD 384

USB-D/A-Wandler: KingRex UD 384

Source: www.connect.de

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DACs: Brik Dac, Quad Link D-1 USB, KingRex USB DAC UD-01 ...

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