TEAC UD 301 - Digital to Analog Convertor

by TEAC
Rs. 60,000.00

A new standard in high-resolution audio, delivering high performance audio from a desktop component.

UD-301 is a D/A converter Dual Monaural configuration supporting USB input of DSD 5.6MHz and PCM 32bit/192kHz. Available with a USB input from PC supporting DSD 5.6MHz and PCM 32bit/192kHz. Using the High-resolution sound source playback software TEAC HR Audio Player installed on one's computer, anyone can enjoy the world of easy high-resolution audio.

Compatibility with an asynchronous mode USB input up to 192kHz to the up-convert

The USB input corresponds to an asynchronous mode that neglects theory USB transmission jitter, It will do the transfer of digital audio signal in a pure state. In addition, it is equipped with a S/PDIF input of two lines, coaxial digital inputs up to 24bit/192kHz and optical digital input supporting up to 24bit/96kHz. Compatible with a digital signal input with an up-convert up to 192kHz. CD sound quality equivalent of 44.1kHz sound source can also be enjoyed in the high-resolution environment.

Dual monaural structure with reduced interference of the left/right channels

For the D/A converter that process enormous amount of information, it is equipped with BurrBrown PCM1795 left/Right independent. We use an operational amplifier that determines the sound quality for the analog circuit such as MUSES8920 designed to HiFi equipment dedicated one by one especially for left and right, we have adopted a dual monaural configuration that eliminates the interference between the left and right channels. Furthermore, it is adopted with a CCLC (Coupling Capacitor-Less Circuit) system, it is a dual monaural configured with a left and right independent circuit. Adopting a toroidal core power transformer for the power supply. It will supply a stable current even momentarily scene that requires a large amount of current, such as when the rise of the sudden sound.

No compromise to the headphone listening, and a high efficiency in activity

Audio output is added to the RCA unbalanced outputs, Equipped with XLR balanced output. Furthermore, you can select these audio output level fixed, variable, from the output off. It can be connected directly to a power amplifier or active speakers from the "UD-301" If set variable, and interrupting the circuit not involved in the headphone output if it is set to the output OFF. Dedicated to suit the performance with the "UD-301" to the headphone output, and it will function as a high-performance headphone amplifier.

The "UD-301" is not only supporting D/A conversion of USB input but also a USB DAC preamplifier, it is also equipped with a DAC high-performance headphone amplifier to fit the High-resolution of the new standard of the era.

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 first 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 theTEAC website.

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 for hi-fi audio.

Doubles as a no-compromise, high-performance headphone amp

In addition to the dual monaural headphone circuits, there are options to switch off the XLR and RCA outputs on the rear panel. By cutting the power supply and isolating those circuits that are unrelated to the headphone output, the performance of the UD-301's headphone output can be maximized. This feature also makes the headphone amp very easy to use as the volume control for the headphones is completely separate from the output mode (Fixed, Adjustable or Off) on the rear panel.

Well-engineered aluminum enclosure, compact proportions

Following on from our development of the 501 series concept (small high-performance audio components that can be fitted on a desktop) we decided, at the outset, that the 301 series would be an even more compact design. Now, the casework has been shrunken to just 215mm wide, allowing greater freedom in positioning the amplifier. External highlights include aluminum panels and a motor-driven volume knob with the tactile feel you'd expect from controls found in high end full-size hi-fi components. At the same time, the solid enclosure underpinned by the metal chassis, is impressively inert, minimizing the effects of vibration on the unit's sound quality.

Connectable to a power amp in pre-amp mode

The XLR balanced output and RCA unbalanced outputs on the rear panel can both be set at Fixed, Adjustable or Off. Using the Adjustable setting, the UD-301 can be connected to a power amplifier to create a system with a separate pre amp and power amp or, alternatively, can be directly connected to an active speaker.

Asynchronous mode-capable USB input

When receiving digital audio signals from a computer via USB cable, the unit can operate in asynchronous 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.

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 circuits, a capacitor is used for output-stage coupling, and so the sound is unavoidably colored. When the capacitor is combined with a high-pass filter this often results in phase lags, or low frequency level degradation. With CCLC the negative impact of capacitors on sound quality is eliminated, providing full low-frequency sound and a responsive headphone listening environment with great spatiality.

Toroidal core power transformer provides stable power flow

A high-efficiency toroidal core power transformer with low magnetic flux leakage is used to guarantee the stable operation of the twin left and right D/A converters that are so essential to the UD-301's high-speed signal processing. This transformer provides a stable power supply even in situations where a sudden surge of power is required, such as when starting up at very high volume.

XLR balanced output

The UD-301 is equipped with an XLR balanced output that can be connected not only to other domestic hi-fi components but also to professional audio equipment. As a highly versatile, high-performance D-A converter, the UD-301 offers a high degree of interoperability with devices ranging from those used by discerning consumers all the way up to those used in the professional domain.

Features

  • 2.8MHz/5.6MHz DSD native playback (via USB input)
  • 24bit/192kHz PCM file playback
  • Asynchronous mode capability
  • 192kHz up-conversion option (with On/Off selection)
  • 2 x BurrBrown PCM1795 digital-to-analog converters
  • Dual monaural design
  • 2 x MUSES8920 operational amplifier units
  • Dual monaural CCLC headphone output circuit
  • Toroidal core power transformer
  • Full metal housing
  • 1×USB input (USB B type)
  • 1×coaxial digital input
  • 1×optical digital input
  • 1×XLR balanced output (Fixed/Adjustable/Off)
  • 1×RCA balanced output (Fixed/Adjustable/Off)
  • Headphone output (standard stereo jack)
  • Three-pin IEC AC power socket
  • Auto Power Save function

Specifications

DAC Section  
D/A Converter BurrBrown PCM1795×2
Up-conversion 192kHz (user defeatable)
Digital audio inputs  
USB  
Connector USB Type B (USB2.0)
Transmission mode Asynchronous mode
DSD data 
sampling frequency
2.8M/5.6M Hz
PCM data 
sampling frequency
32k/44.1k/48k/88.2k/96k/176.4k/192k Hz
Bit rates 16/24/32 bit
COAXIAL  
Connector RCA jack
PCM data 
sampling frequency
32k/44.1k/48k/88.2k/96k/176.4k/192k Hz
Bit rates 16/24 bit
Input level 0.5Vp-p
Input impedance 75 ohms
OPTICAL  
Connector Optical digital connector
PCM data 
sampling frequency
32k/44.1k/48k/88.2k/96k Hz
Bit rates 16/24 bit
Input level -24 to -14.5dBm peak
Analog audio outputs  
XLR  
Connector XLR-3-32
Maximum output level +14dBu(1kHz, full-scale, 10k ohms with load, 0dB when set)
Output impedance 200 ohms
RCA  
Connector RCA jack
Maximum output level 2.0Vrms(1kHz, full-scale, 10k ohms when loaded)
Output impedance 100 ohms
Headphone output  
Connector 6.3mm(1/4") stereo phone jack
Maximum output 100mW + +100mW (32 ohms with load, distortion rate 0.1%)
Compatibility impedance 8 ohms to 600 ohms
Power supply  
USA/Canada AC 120V, 60Hz
Europe AC 230V, 50Hz
Power consumption 10W
Dimensions
(including protrusions)
215(W)×61(H)×238(D)mm
8.5"(W)×2.4"(H)×9.4"(D)
Weight 2.0kg
4.4 lbs
Accessories Power cord, Instruction Guide (including Warranty)

 

Audio performance
Frequency response 5Hz to 55kHz (-3dB, in the case of 192kHz sampling frequency)
S/N ratio 105dB
Distortion 0.0015%(1kHz, in the case of 192kHz sampling frequency)

 

Support

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