TEAC NT-505 Product information
Last Update：2017/12/14
Supplemental to New Product Information (SNPI)
NT-505
USB DAC/Network Player
Dual monaural USB DAC/Network Player
supporting DSD512 and PCM32/768
■ Main functions
● Hi-Res audio playback supporting DSD512 (22.6MHz) and PCM 768kHz/32-bit PCM
● Dual monaural circuit design with a high-end AKM VERITA AK4497 DAC on each channel
● Supports MQA decoder and music subscription services (TIDAL and Qobuz) and is Roon-ready
● DSD128 (5.6MHz) and PCM 192kHz/24-bit Network streaming from NAS/PC
● 5 types of PCM digital filters and 2 types of DSD digital filters
● Up-conversion up to 24.5MHz DSD and 384kHz/32-bit PCM
● Dual on-board clocks for 44.1kHz and 48kHz frequencies, and 10MHz external clock input
● Bluetooth® receiver supporting LDAC™ and Qualcomm® aptX™ HD
● TEAC-HCLD output buffer circuit and TEAC-QVCS volume control for high quality sound
● “Bulk Pet” USB transfer technology, with four transfer modes to vary sound character *1
● Free TEAC HR Audio Player and TEAC HR Streamer app
*1 "Bulk Pet" is a registered trademark of Interface Corporation.
Brand TEAC
Series Reference 505
Model NT-505-B NT-505-S
Color Black Silver
UPC Code 043774 033348 043774033355
EAN Code 4907034 221806 4907034 221813
Date of Launch February, 2018 March, 2018
Estimated Market Price JPY168,000 (tax excluded)
Product Dimensions
(W x H x D) / NW
Package Dimensions
(W x H x D) / GW
Qty. per Master Carton 1
290 × 81.2 × 248.7 mm / 11.4” x 3.2” x 9.8”
3.9 kg / 8.6 lbs.
440 × 190 × 340 mm / 17.3” x 7.5” x 13.4”
5.3 kg / 11.7 lbs.
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Last Update：2017/12/14
Supplemental to New Product Information (SNPI)
■ Product overview
The NT-505 is a flagship dual monaural USB DAC with versatile network playback capabilities. It
successfully incorporates the latest network technologies, along with TEAC’s decades of
accumulated audio design experience, in an attractive package with an A4-sized footprint.
Like its predecessor (the NT-503) it employs a dual monaural circuit design to process audio
signals with even greater purity, with the latest VERITA AK4497 DAC chip used on each of the
two channels. This improves the S/N (signal to noise) ratio by processing each channel
individually in monaural mode, as well as delivering DSD512 (22.5MHz) native and 768kHz/32-bit
PCM playback capabilities.
The analogue section, which is one of the keys to sound quality, includes four TEAC-HCLD buffer
amp circuits that allow different drive modes, – fully-balanced drive for balanced output, and
parallel drive mode for unbalanced output – to achieve enhanced acoustic expression.
On the network audio side, the NT-505 supports high-quality music subscription services, namely
TIDAL and Qobuz, and is Roon Ready. There’s also a built-in MQA decoder, and you will enjoy
unlimited music content on the Internet thanks to its high-quality digital and analogue processing
technologies.
In addition to a wide range of digital and analogue inputs, a Bluetooth® receiver supporting
LDAC™ and Qualcomm® aptX HD™ allows you to stream high-quality audio wirelessly from your
smartphone to this flagship USB DAC.
The NT-505 is a compact and high-spec USB DAC and network player that supports the latest HiRes formats and online music subscription services.
For the ultimate digital-to-analogue performance
● High-performance VERITA AK4497 DACs supporting DSD512 and PCM32/768
The NT-505 employs the latest VERITA AK4497 (developed by Asahi Kasei Microdevices) on each
of the left and right channels. It is a highly-regarded high-end audio DAC, and supports DSD512
(22.5MHz) and 768kHz/32-bit PCM formats, achieving industry-leading ultra low distortion levels.
OSRD (Over-sampling Ratio Doubler) technology, meanwhile, significantly reduces out-of-band
noise. As a result, the NT-505 has the refinement necessary to make the most of Hi-Res formats,
successfully processing information that lies outside the audible range.
* The AK4497 is the flagship product of the Asahi Kasei Microdevices Audio4pro™ family, which has been developed for
professional audio equipment and high-end digital audio.
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Last Update：2017/12/14
Supplemental to New Product Information (SNPI)
● Dual monaural circuit design and fully-balanced design
A dual monaural circuit configuration is used throughout, from the power supply (including power
transformers), to the D/A converters in the digital section and the analogue output stage. From
the high-performance VERITA AK4497 D/A converters to the massive toroidal-core power
transformers, each element is configured for single channel processing. This prevents mutual
interference effects while reproducing a rich acoustic expressiveness.
In addition, the analogue audio signals of both the left and right channels are processed in full
balanced mode soon after the D/A converters all the way to the output terminal, contributing to
an improved S/N ratio and extended dynamic range. This allows the fantastic sense of air that HiRes formats possess to be processed and conveyed without any losses.
● Supports TIDAL and Qobuz music subscription services, and is Roon Ready
Connecting to your home network via a LAN cable, the NT-505 allows you to access Hi-Res music
libraries on available music servers and computers, as well as hundreds of millions of CD-quality
tracks on Internet via music subscription services like TIDAL and Qobuz.
The NT-505 is also a Roon Ready product that enables Hi-Res audio streaming thanks to its highperformance D/A converters.
*Roon Ready is scheduled to be deployed in the near future.
● MQA decoder for master quality streaming
In order to achieve an analogue waveform closer to the original signal, the NT-505 supports MQA
decoding while also supporting high sampling rate Hi-Res formats like DSD512 and PCM32/768. The
MQA decoder is a totally new technology that controls analogue waveforms with excellent precision
(as fine as 5 microseconds) and it reproduces sound in a manner that is perceived to be as close as
possible to the original (to human hearing).
Furthermore, a high-efficiency compression algorithm makes huge Hi-Res audio files compact in size,
so you will be able to enjoy Hi-Res audio sources regardless of the speed of your Internet connection.
※
*MQA Ready is scheduled to be deployed in the near future.
● High-quality wireless audio streaming via Bluetooth®
In addition to conventional SBC and AAC codecs, the NT-505 also supports LDAC™ (24/96 Hi-Res
audio transmission), and Qualcomm® aptX™ HD, a codec that uses 24/48 format transmission.
These allow you to playback playlists on your smartphone and tablet wirelessly.
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Last Update：2017/12/14
Supplemental to New Product Information (SNPI)
● Hi-Res audio playback from USB flash drive
The USB port on the front panel allows you to playback Hi-Res audio formats including DSD128
(5.6MHz) and PCM 24/192.
● Dual onboard clocks for 44.1k and 48kHz, and an external clock input
Instead of referencing to an unstable and noisy PC clock during USB audio
playback, a more accurate and on-board clock is generated by a high-precision,
low phase-noise, audio-grade crystal oscillator for USB asynchronous transfer
mode. The NT-505 accommodates two on-board clocks exclusively for 44.1kHz
and 48kHz sampling frequencies and applies the appropriate one to incoming digital signals –
those that are multiples of 44.1k or 48k – to reproduce identical sound to the original by
eliminating jitter effects on the audio signal.
In addition, an external 10MHz clock input is also provided, to synchronise with an even higherprecision master clock generator, such as the TEAC CG-10M, for yet further upgraded audio
playback with excellent sound quality.
● Up-conversion up to 384kHz/32-bit PCM and 24.5MHz DSD
Employing RDOT-NEO (Refined Digital Output Technology NEO), a fluency algorithm that renders
digital audio signals smoothly, the NT-505 up-converts PCM digital signals up to 384kHz/32-bit
PCM and 24.5MHz DSD. With the up-conversion function activated, you will hear an improvement
in quality, even with music that you are familiar with.
● “Bulk Pet” USB transfer technology for enhanced audio quality
When transferring large volumes of digital data for Hi-Res audio sources through USB cables
using conventional isochronous transfer mode, large variations can occur in the processing loads
of the sending computer and the receiving USB DAC. This can cause sound to drop out and other
problems to occur.
However, with our new USB transmission technology – dubbed "Bulk Pet” - a fixed amount of
data is transmitted constantly, levelling out the processing burden on both devices and
contributing to stable data transmission. Changing the
processing burden on the computer directly affects audio quality so users can select the setting
they prefer (from four transmission modes).
*"Bulk Pet" is a registered trademark of Interface Corporation.
For more information about "Bulk Pet," please visit the Interface Corporation website.
https://www.itf.co.jp/prod/audio_solution/bulk-pet
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