TEAC UD-701N USB DAC / Network Player


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With a revamped discrete DAC, this advanced all-around unit serves as the core of your high-performance audio system.

Newly-developed TEAC Delta Sigma discrete DAC

Instead of using a generic DAC IC, we incorporated a newly-developed TEAC ΔΣ (Delta Sigma) discrete DAC comprised of discrete circuitry that uses FPGA incorporating our original algorithms. Analog signals are output with high audio quality. DSD signals are transmitted as is, while PCM signals are transmitted after passing through a ΔΣ modulator and conversion to 1-bit signals.

We can say that achieving this wide, perfectly clear sound field, which can be realized specifically because of the discrete design, is TEAC reaching the pinnacle of its sound objectives.

With the TEAC ΔΣ discrete DAC, playback of 22.5MHz DSD and 384kHz/32-bit PCM is possible.

Dual mono structure

We have incorporated a best-in-class dual mono structure throughout the unit, from the power circuit with independent left and right toroidal core transformers to the D/A converter section and analog output stage.

This dual model structure, which has complete mono circuits for each of the two channels, prevents interference between the left and right channels, enabling the realization of rich musical expression that reproduces the sense of space and dimension.

Fully-balanced transmission at every stage

The fully balanced transmission of both the left and right analog output signals from after D/A conversion through the final output stage improves the signal-to-noise ratio and the dynamic range. This conveys signals in a purer state without losing the sense of air that high-resolution audio sources have.

Four high-capacity toroidal core transformers

In addition to the 2 toroidal core transformers for the independent left and right analog signals, separate toroidal core transformers are also used in both the network module and digital control sections. In particular, stable electricity is supplied to the network module, which requires advanced processing, by strengthening the power supply for the network module section with linear power.

Analog preamplifier function with 2 line inputs via RCA/XLR and 4 digital inputs

Not only as a USB DAC/Network player that employs two sets of coaxial and optical digital inputs, but the UD-701N also works as a high-quality analog preamplifier by employing additional analog audio inputs via RCA and XLR connectors that allow users to connect conventional audio sources.

Our TEAC-QVCS (Quad Volume Control System) is a variable gain amp volume control with four independent circuits for left, right, positive, and negative (L+, L−, R+, and R−). Placing this in the audio signal route makes it as short as possible, preventing the degradation of audio signals caused by drawing them through signal lines. Moreover, since the volume can be adjusted in extremely fine 0.5dB intervals, you can achieve the ideal volume for the audio system or headphones that you are using.

Ud 701n b rear

Improved TEAC-HCLD2 enhanced-current output buffer circuits

We used TEAC-HCLD2 circuits, which are improved versions of our TEAC-HCLD (TEAC High Current Line Driver) enhanced-current output buffer circuits. These raise the current transmission capabilities that are important in analog output circuits. Each channel has a positive and negative two-circuit structure with diamond buffer amplifiers, which have high current transmission capabilities, used as line drivers. Drive is differential for balanced output and parallel for unbalanced output. By increasing the current supply ability, transmitting the dynamism of audio signals without loss becomes possible.

Ud 701n hp connectors

4-pin XLR headphone amplifier that can be switched between balanced and active ground

A total of four diamond buffers, one in each of the left, right, positive and negative circuits, are used in the dedicated headphone amplifier, enabling the connection of balanced drive headphones. Moreover, even during single-end use, by driving these amps in parallel, they can provide a stronger drive than ordinary single-end headphone amplifiers. This enables the potential of many types of headphones, including 600Ω high-impedance headphones, to be realized.

MQA full decoder that also supports digital inputs

MQA (Master Quality Authenticated) is a high-quality audio codec that enables playback at the same quality level as studio masters. The UD-701N has an MQA decoder that controls D/A-converted waveforms with precision as fine as 5 ms in order to achieve analog waveforms that are true to the original recordings. Playback sound that seems like the original to the human ear can be achieved by greatly reducing the “sound blurring” that occurs easily when sounds start suddenly and at other times when sound pressure differences are extreme.

Since a full decoder is included, in addition to file and network playback, MQA data from digital inputs can also be decoded. Playback of MQA CDs is possible by connecting the digital output of a CD player to the UD-701N.


The upconversion function uses RDOT-NEO (Refined Digital Output Technology NEO) to smoothly augment PCM digital audio signals and upconvert their sampling frequencies 2, 4, or 8 times (384kHz maximum). RDOT, which applies an analogous interpolation method using fluency logic, is a technology that was developed to enable reproduction and playback of frequencies higher than 20 kHz that are lost by 44.1kHz/48kHz digital signals. Based on the information read, analogous data is generated between the waveform samples, which also results in data above 20 kHz.

Ud 701n bluetooth pc

Bluetooth® receiver supports LDAC, aptX HD, and other high-resolution transmission formats

In addition to the LDAC and LHDC codecs, which can transmit audio data with quality that is considered high resolution (96kHz/24-bit), it also supports Qualcomm® aptX HD, which is capable of 48kHz/24-bit transmission. Of course, the popular AAC, Qualcomm® aptX™, and SBC codecs are also supported, so you can easily enjoy high-quality wireless playback from smartphones and digital audio players.

Open home roon ready logo pc

Support for popular and convenient network functions, including OpenHome and Roon Ready

Smart Home apps can be used with the UD-701N, which also supports this platform. Moreover, playlists on the UD-701N can be managed using TEAC HR Streamer and other control apps that support OpenHome. Gapless playback is also supported.

With support for Roon Ready, functions provided by RAAT (Roon Advanced Audio Transport), including high-quality audio playback, easy and convenient operation using apps, and multi-room synchronized playback can be used without limits.

Spotify tidal qobuz logo pc

Spotify Connect, Tidal, Qobuz, and TuneIn (Internet Radio)

Along with Spotify Connect, this model also supports Tidal and Qobuz, which are subscription music streaming services that enable listening to lossless CD-quality (44.1kHz/16-bit) recordings.
Tidal Connect will be added in a firmware update made available after product release.

Bulk pet logo pc

Bulk Pet USB transfer technology enables stable data transmission

When transmitting large amounts of digital data by USB cable from high-resolution audio sources, large inconsistencies arise in the processing loads of both the sending computer and the receiving USB DAC, and audio dropouts and other problems can occur. Using the Bulk Pet USB transfer technology, however, the same amount of data is transmitted at a steady rate, leveling the processing loads of both sides and realizing stable data transmission. Since changes in computer load conditions can also affect audio quality, you can select from four preset transmission modes to choose your preferred audio quality.

Ud 701n chassis

Design features to prevent vibration

A floating structure is utilized to keep transformers, which can easily cause vibrations, isolated from the bottom panel. The lengths of all the side fins, which are for heat dispersion, have also been adjusted to prevent sympathetic vibrations.

In addition to using the minimum number of circuit board attachment screws, TEAC original pinpoint feet that utilize a new mechanism to provide play where they contact the bottom panel is used to thoroughly suppress vibrations that affect audio quality.

Spec description

DAC section
DAC TEAC ΔΣ Discrete DAC × 2
Upconvert 2xFs / 4xFs / 8xFs (maximum 384kHz)
Analog audio inputs
Connectors XLR × 1 pair
Input impedance 50kΩ
Maximum input level 5Vrms
Connectors RCA Pin (gold-plated) × 1 pair
Input impedance 25kΩ
Maximum input level 2.5Vrms
Digital audio inputs
Connectors USB B-type × 1, (USB2.0 compliant)
Supported formats
PCM 16 / 24 / 32bit
44.1k / 48k / 88.2k / 96k / 176.4k / 192k / 352.8k / 384kHz
DSD 2.8M / 5.6M / 11.2M / 22.5MHz
Connectors RCA Pin (god-plated) × 2 pairs
Input level 0.5Vp-p
Input impedance 75Ω
Supported formats
PCM 16 / 24bit
32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz
DSD 2.8MHz (176.4kHz/24bit DoP format)
Connectors Rectangular (TOS) × 2 pairs
Input level –24.0 to –14.5dBm peak
Supported formats
PCM 16 / 24bit
32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz
DSD 2.8MHz (176.4kHz/24bit DoP format)
Connector RJ-45 × 1 (1000Base-T)
Supported formats
PCM 16 / 24 / 32bit
32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz / 352.8k / 384kHz (Stereo)
DSD 2.8M / 5.6M / 11.2M / 22.5MHz (Stereo)
Supported formats
PCM lossless FLAC, Apple Lossless (ALAC), WAV, AIFF, MQA
DSD lossless DSF, DSDIFF (DFF), DoP
Compressed audio MP3, AAC (m4a container)
USB flash drive
Connectors USB A-type × 2 (Front × 1, Rear × 1, USB2.0 compliant)
Supported file system FAT32, exFAT and NTFS single partation
Supported file format
PCM 16 / 24 / 32bit
32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz / 352.8k / 384kHz (Stereo)
DSD 2.8M / 5.6M / 11.2M / 22.5MHz (Stereo)
Supported file formats
PCM lossless FLAC, Apple Lossless (ALAC), WAV, AIFF, MQA
DSD lossless DSF, DSDIFF (DFF), DoP
Compressed audio MP3, AAC (m4a container)
Bluetooth® version 4.2
Output class Class2 (rrange: 10m)
Supported profile A2DP, AVRCP
Supported A2DP codec LDAC, LHDC, AAC, SBC, Qualcomm®aptX audio/HD audio
A2DP content protection SCMS-T
Number of saved pairings Maximum 8
Analog audio outputs
Connectors XLR (gold-plated pins) × 1 pair
Output impedance 220Ω
Output level settings Selectable from Fixed (0dB), Fixed (+6dB), Variable, or Off
Maximum output level 2.0Vrms (1kHz, Full-scale, 10kΩ loaded, FIxed at 0dB)
4.0Vrms (1kHz, Full-scale, 10kΩ loaded, FIxed at +6dB)
12Vrms (1kHz, Full-scale, 10kΩ loaded, Variable)
Connectors RCA Pin (gold-plated) × 1 pair
Output impedance 180Ω
Output level settings Selectable from Fixed (0dB), Fixed (+6dB), Variable, or Off
Maximum output level 2.0Vrms (1kHz, Full-scale, 10kΩ loaded, FIxed at 0dB)
4.0Vrms (1kHz, Full-scale, 10kΩ laoded, Fixed at +6dB)
6.0Vrms (1kHz, Full-scale, 10kΩ loaded, Variable)
Headphone outputs
Connector 4-pin XLR × 1
Pin asign Pin1: L+, Pin2: L–, Pin3: R+, Pin4: R–
Connector 6.3mm Stereo jack (gold-plate) × 1
Maximum output power
Balanced 700mW + 700mW (32Ω loaded)
Unbalanced 500mW + 500mW (32Ω × 1 loaded)
Supported impedance 16 to 600Ω
Clock sync input
Connector BNC (gold-plated) × 1
Input frequency 10MHz
Input impedance 50Ω
Input level
Rectangle wave Equivalent to TTL
Sine wave 0.5 to 1.0Vrms
External control
Trigger Input (12V TRIGGER IN)
Connector 3.5mm Mono mini jack × 1
Input level 12V, 1mA
Trigger output (12V TRIGGER THRU)
Connector 3.5mm Mono mini jack × 1
Output level 12V
Maximum current supply 100mA
Audio performance *Measurement conditions: Input signal: 192kHz/24-bit PCM, Measurement output: RCA, DAC low-pass filter: On
Frequency response 5Hz to 80,000Hz (+1dB/–5dB)
Total harmonic distortion 0.002%
S/N ratio 108dB (A-Weight, 1kHz)
Power AC120V, 560Hz (US/Canada)
AC230V, 50Hz (UK/Europe)
Power consumption 40W
Standby power 0.4W
Overall dimensions 444 (W) × 111 (H) × 334 (D) mm (including protrusions)
Weight 11.8kg
Operating Temperature +5℃ to +35℃
Operating Humidity Range 5% to 85% (no condensation)
Storage Temperature Range –20℃ to +55℃
Included accessory Power cord, Remote control (RC-1330), AAA batteries × 2, Owner’s manual, Foot pad x 3


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