TEAC UD-301 Product information
Last Updated On: April 21, 2014
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Supplemental to New Product Information (SNPI)
UD-301 Dual Monaural Digital-to-Analog Converter
A new standard in high-resolution audio,
delivering high performance audio from a desktop component
■ Main Feature
A compact (215mm width) digital-to-analog converter (DAC) with USB input
Compatible with 2.8MHz/5.6MHz DSD native playback and 32bit/192kHz high-resolution sound sources
Asynchronous transmission mode capability and 192kHz up-conversion option
Dual monaural design eliminates interference between the left and right channels. Built around twin
BurrBrown PCM1795 DAC chips
Toroidal core power transfor mer
XLR balanced output
The USB DAC can be directly connected to a power amplifier or active speaker and the output level (XLR,
RCA) can be set to fixed, adjustable or off.
By setting the XLR or RCA output level to “Off,” unnecessary circuits (other than those of the headphone
amplifier) are isolated, enabling the sound quality of the headphone amplif ier to be further enhanced.
Full metal housing provides both excellent vibration control and a classy look, in a compact size allowing
convenient desktop positioning
Brand
Series Reference 301 Series Reference 301
Model UD-301-B Model UD-301-S
Announcement Date 2/5/2014 Announcement Date 2/5/2014
Estimated Delivery Date April 2014 Estimated Delivery Date April 2014
UPC Code 043774030729 UPC Code 043774030699
EAN Code 4907034218721 EAN Code 4907034218738
Overall Dimensions / NW
W x H x D
Package Dimensions / GW
W x H x D
Qty. per Master Carton n/a Qty. per Master Carton n/a
EAC Brand
215 x 61 x 238 / 2.0 (mm/kg)
8.5 x 2.4 x 9.4 / 4.4 (inch/lbs)
391 x 150 x 396 / 2.8 (mm/kg)
15.4 x 5.9 x 15.6 / 6.2 (inch/lbs)
Overall Dimensions / NW
W x H x D
Package Dimensions / GW
W x H x D
EAC
215 x 61 x 238 / 2.0 (mm/kg)
8.5 x 2.4 x 9.4 / 4.4 (inch/lbs)
391 x 150 x 396 / 2.8 (mm/kg)
15.4 x 5.9 x 15.6 / 6.2 (inch/lbs)
Last Updated On: April 21, 2014
Supplemental to New Product Information (SNPI)
■ Dual monaural design, compatible with high-resolution DSD
Capable of 5.6MHz DSD native playback
The USB input facility allows DSD native playback which converts 5.6MHz DSD
files directly into analog signals without needing f irst to convert it to PCM. It
supports both the ASIO2.1 and DoP (DSD over PCM) conversion methods. Using
the AI-301DA in conjunction with the TEAC HR Audio Player* high-resolution
playback computer software application, anyone can easily explore the world of
high-rez digital audio, including 5.6MHz DSD or 32bit/192 kHz PCM files, without
having to grapple with complex settings etc.
* TEAC HR Audio Player can be downloaded for free from the TEAC website.
Asynchronous mode-capable USB input
When receiving digital audio signals from a computer via USB cable, the unit can oper ate in asynchr onous mode,
controlling the timing of the input signal using the UD-301's internal clock (which is identical to the one used in
the UD-501). With asynchronous transmission over USB, signal compromising jitter is effectively eliminated,
allowing digital audio signals to be transmitted in a pure, unadulterated state.
Up to 192kHz up-conversion option.
When handling digital signals of 96kHz and less, users have the option to upconvert to double or quadruple the
original signal sampling frequency. Even when playing back a 44.1kHz sound source (equivalent to CD sound
quality) a smoother analog audio signal can be obtained in order to convert to a higher resolution digital signal.
Naturally, this up-conversion facility can be switched in or out, according to the user's preference.
Dual monaural design eliminates interference between the left and right channels
In order to process the audio signal from a high-resolution sound source in a purer state, we adopt a dual
monaural circuit design whereby each of the left and right channels comprises its own single monaural circuit. This
avoids mutual interference between the left and right channels and enables pure stereo playback.
High-performance BurrBrown PCM1795 digital-analog converter
The two internal BurrBrown 1795 digital-to-analog converter units each work on a single
channel (left or right) for true dual monaural operation. They are capable of 32-bit
processing and so have the capacity to process 5.6MHz DSD data in large quantities,
making them indispensible for faithful and accurate playback of high-resolution sound
sources.
MUSE operational amplifier enables highest quality analog signal processing
We use these in the analog circuit, they are a vital element in determining the final sound
quality. They transform the electrical current output of the D/A converter into a voltage
signal. We opted for a dual monaural configuration for the operational amplifiers,
employing two MUSES8920 operational amplifier units, one on each of the left and right
channels. These devices are made by New Japan Radio and are designed especially f or hi-fi
audio.
Even the headphone amplifiers used in the CCLC circuits are of dual monaural
design
The 100mW + 100mW output (at 32 ohms load) headphone amplifier uses CCLC
(Coupling Capacitor Less Circuit) technology. In conventional headphone output
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