Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
1
UD-301-X
USB DAC
Shrinking high-performance audio into a desktop-friendly package,
this is a full-fledged dual monaural DAC (digital to analogue converter)
Features at-a-glance
Compact DAC (digital to analogue converter) with USB Audio input
Supports DSD128 Native and PCM 384kHz/32-bit Hi-Res audio
Asynchronous Transfer Mode and Up-conversion to 192kHz
Dual monaural design to eliminate cross-talk between Left and Right channels
BurrBrown PCM1795 32-bit DAC for each channel
Toroidal-core power transformer
XLR analogue balanced output
Selectable output modes (Fixed, Variable, and Off) allow use as a Pre-amplifier with USB DAC
Headphone sound can be improved by switching off XLR/RCA outputs
Full-metal body
Brand
TEAC
Series
Reference 301 series
Model
UD-301-X-B
UD-301-X-S
Color
Black
Silver
UPC code
43774033737
43774033744
EAN code
4907034222438
4907034222445
Overall dimensions (W x H x D)
NW
215 x 61 x 238 /8.5” x 2.4 x 9.4”
2.0kg / 4.4 lbs
Carton dimensions (W x H x D)
GW
391 x 150 x 396 / 15.4” x 5.9” x 15.6”
2.8kg / 6.4 lbs
Quantity per Master Carton
1
Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
2
Product overview
The UD-301-X is a USB DAC in the Reference 301 range, with a low-profile and small footprint that
comfortably fits into the smallest spaces on desktops.
Supports the playback of DSD128 and PCM 192 kHz /32-bit content from PC/Mac and features an
improved analogue audio stage delivering excellent sound quality to your existing hi-fi system.
In addition, an innovative CCLC headphone amplifier circuit allows you to use the UD-301-X as a
high-grade, standalone headphone amplifier as part of a minimalist desktop system, comprising
which a computer, headphones and the UD-301-X.
Supports DSD Hi-Res audio, and dual-monaural circuit design
Supports DSD128 Native playback
The UD-301-X is equipped with a USB port supporting DSD Native
playback. This directly converts DSD signals into an analogue waveform in
ASIO2.1 and DoP formats, without changing the PCM format. In addition,
asynchronous transfer mode is also supported for accurate data transfer
by referencing the more accurate on-board clock of the AI-301DA-X.
Furthermore, a free TEAC HR Audio Player allows users to play back HiRes files such as DSD128 and PCM192/32 from Windows/Mac without the
need for complicated configuration.
USB streaming supporting asynchronous transfer mode
As digital audio data travels from a computer to the UD-301-X via a USB cable, timing control for
sending/receiving data packets is defined by the UD-301-X’s internal clock which is much more
accurate than that of most computers. This asynchronous transfer mode theoretically eliminates
signal-compromising jitter, and allows digital audio signals to travel in electrically ‘cleaner’ conditions.
Up to 192kHz up-conversion
When handling digital audio signals of 96kHz or less, you are able to up-convert them to double or
quadruple the original signal sampling frequency. Even when playing back a conventional CD (which
is 44.1kHz), a smoother analogue audio signal is obtained by up-converting to a higher sampling
frequency. This up-conversion function can be disabled, according to the user’s preference.
Dual monaural design to eliminate signal interference
In order to process Hi-Res audio data under the best conditions, the UD-301-X
employs a dual monaural circuit design whereby each of the left and right channels
comprises its own single monaural circuit. This circuit design avoids mutual
interference between left and right channels and enables improved stereo
playback.
High-performance BurrBrown PCM1795 32-bit DACs
At the heart of its digital audio section, the UD-301-X uses a pair of 32-bit
processing DACs (digital to analogue converters), namely BurrBrown PCM1795s,
Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
3
one for each channel. These high-performance DACs are capable of processing large amounts of data
such as DSD128, rendering more accurate playback of Hi-Res audio sources.
MUSES8920 Op-amps for high quality analogue audio processing
On the analogue processing side, key to defining final sound quality, the
MUSES8920 Op-amps developed by New Japan Radio Corporation are
employed to process the I-V conversion which turns output current from
the DACs into voltage signals. A dual-monaural approach is also applied to this stage of processing.
CCLC for dual-mono headphone amplifier circuit
When listening to Hi-Res music via the UD-301-X’s dual-monaural headphone amplifier circuit, the
CCLC (Coupling Capacitor-Less Circuit) delivers a rich bass sound and quick transient responses.
Conventional headphone amplifier circuits cannot avoid reduction of low frequencies and
misalignment of phase caused by high-pass filtering within capacitors as they couple output stages.
Also works as a standalone headphone amplifier
In addition to its dual monaural headphone amplifier circuit design, the UD-301-X further strengthens
its credentials as a headphone amplifier by offering the ability to disable XLR and RCA outputs on the
rear panel. This limits power supply to the headphone amplification process, so maximizing its
potential for headphone output. The UD-301-X offers ease of use as a headphone amplifier because
the headphone volume is always varied by the master volume control on the front panel, regardless
of the output mode (fixed, variable or disabled).
Toroidal-core power transformer for plenty of power
The UD-301-X features an energy-efficient Toroidal-core power
transformer to deliver plenty of stable current to every single part of the
circuit, including two high-performance DACs (digital to analogue
converters) that carry out ultra-high-speed processing. Even when there
are sudden dynamic swings, where large amounts of current are required
instantly, the UD-301-X’s power supply will prove equal to the task.
Robust aluminum body, and small footprint
A 215mm width and 238mm depth creates a footprint that allows you to place the unit in the
smallest of spaces, while the full-metal body provides excellent rigidity and minimizes the adverse
effects of vibration on final sound quality.
XLR Balanced outputs
The UD-301-X is capable of working as a high-performance DAC with professional audio equipment
and high-end audio units, as well as with consumer hi-fi components, thanks to its pair of XLR
Balanced output terminals.
Pre-amplifier mode to connect with power amplifier
The output from both XLR Balanced and RCA Unbalanced outputs can be set to, fixed, variable or
disabled, depending on your needs. This flexibility, among other things, allows you to connect to
power amplifiers for a separates-based system or, indeed, active speakers when the unit is set to
variable mode.
Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
4
■ Key Features
Supports DSD64 and DSD128 native playback (on USB Input)
Supports PCM 192kHz/24-bit playback
Asynchronous Transfer Mode
Up-conversion to 192kHz (user defeatable)
Dual 32-bit BurrBrown PCM1795 DACs
Dual monaural circuit design
Dual MUSES8920 Op-amps
Dual monaural CCLC Headphone amplifier circuit
Toroidal-core power transformer
Full-metal body
USB Audio input
Coaxial digital audio output
Optical digital audio output
XLR analogue balance output (Output level: Fixed, Variable, Disabled)
RCA analogue unbalanced output (Output level: Fixed, Variable, Disabled)
Headphone output (1/4” Stereo phone jack)
Detachable power cable
Auto-power saving
RoHS compliant
Specifications
Supported formats
USB Audio input
DSD DSD128 (5.6MHz), DSD64 (2.8MHz)
PCM 16, 24, 32-bit, 32k, 44.1k, 48k, 88.2k, 96k, 176.4k, 192kHz
Coaxial digital input
PCM 16, 24-bit, 32k, 44.1k, 48k, 88.2k, 96k, 176.4k, 192kHz
Optical digital input
PCM 16, 24-bit, 32k, 44.1k, 48k, 88.2k, 96kHz
DAC section
D/A Converter BurrBrown PCM1795 x 2
Up-conversion Max 192kHz (On/Off selectable)
Audio Inputs/Outputs
USB Audio input
Connector USB B-type x 1
USB version USB2.0
Transfer mode Asynchronous transfer mode
Recommended software TEAC HR Audio Player (Mac, Windows)
Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
5
Coaxial digital audio input
Connector RCA Pin x 1
Impedance 75 ohms
Input level 0.5Vp-p
Optical digital audio input
Connector TOS-link x 1
Input level -24.0 to -14.5dBm peak
Analog balanced output
Connector XLR 3-32 x 1 pair
Impedance 200 ohms
Max output level +14dBu (1kHz, Full-scale, 10k ohms loaded, 0dB setting)
Analog unbalanced output
Connector RCA Pin x 1 pair
Impedance 100 ohms
Max output level 2.0Vrms (1kHz, Full-scale, 10k ohms loaded)
Headphone output
Connector 1/4” (6.3mm) Stereo headphone jack x 1
Supported impedance 16 to 600 ohms
Max output power 100mW + 100mW (32 ohms loaded, THD 0.1%)
Audio performance
Frequency response 5Hz to 55kHz (-3dB, Sampling frequency: 192kHz)
Signal-to-Noise ratio 105dB
Total harmonic distortion 0.0015% (1kHz, Sampling frequency: 192kHz)
Supported OS
Windows
Windows 10 (April 2018 Update) , Windows 10 (November Update) , Windows 8.1 , Windows 8 , Windows 7 ,
Windows Vista , Windows XP (32bit ver.)
Mac
macOS High Sierra (10.13) , macOS Sierra (10.12) , OS X El Capitan (10.11) , OS X Yosemite (10.10) , OS X
Mavericks (10.9) , OS X Mountain Lion (10.8) , OS X Lion (10.7) , Mac OS X Snow Leopard (10.6)
Please check the latest information on the web page: https://teac.jp/int/product/ud-301/spec
General
Operating power AC 120V, 60Hz (US/Canada)
AC 230V, 50Hz (UK/Europe)
Power consumption 10W
Overall dimensions (W x H x D) 8.5” x 2.4” x 9.4” / 215 x 61 x 238mm
Net weight 4.4 lbs. / 2.0kg
Last update: 2019/1/19
Supplemental to New Product Information (SNPI)
6
Included items
AC power cable x1
Owner’s Manual (including Warranty)
Rear Panel
Loading...