Teac NT-505 User manual

TEAC NT-505 USB DAC
NETWORK PLAYER
MANUAL

About TEAC
TEAC Is a known and reputable name in the industry, creating a wide array of products that are accessible to the novice
music lover all the way to the professional or audiophile. Since 1953, TEAC was the rst to create the 1/2-inch 4-track
cassette recorder, the 8-track reel-to-reel/mixer combo, the rst R-DAT recorder, and the rst MiniDisc digital multi-tracker
and CD scratcher. But they are not just pro audio. TEAC creates some of the cleanest and feature-packed units in the
audiophile and consumer audio market.
In a way, it makes sense that you want an audio company to have both hands in the proverbial cookie jar of pro and
consumer audio. With a grounding and product line of recording equipment, it seeks to complement consumer audio
gear, with the understanding of how e󰀨ective recording is done which should ultimately translate into more e󰀩cient and
accurate high-end audio playback devices. Knowing how to record audio helps to understand not just how to play it back,
but to better recreate the original sound. TEAC knows this and it plays to their advantage.
About the NT-505
The NT-505 is a agship 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.
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,
signicantly reduces out-of-band noise. As a result, the NT-505 has the renement necessary to make the most of Hi-Res
formats, successfully processing information that lies outside the audible range.
* TheAK4497istheagshipproductoftheAsahiKaseiMicrodevicesAudio4pro™family,whichhasbeendevelopedforprofessionalaudio
equipmentandhigh-enddigitalaudio.
A dual monaural circuit conguration is used throughout, from the power supply (including power transformers), to the D/A
converters in the digital section and the Analog output stage. From the high-performance VERITA AK4497 D/A converters
to the massive toroidal-core power transformers, each element is congured for single channel processing. This prevents
mutual interference e󰀨ects while reproducing a rich acoustic expressiveness. In addition, the Analog 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
Hi-Res formats possess to be processed and conveyed without any losses.
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, in addition to free music subscription service Spotify that delivers over 50 millions music
from the world. The NT-505 is also a Roon Ready product that enables Hi-Res audio streaming thanks to its high-perfor-
mance D/A converters.

Features
▪ 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 decoding
▪ Spotify, TIDAL, and Qobuz music subscription services
▪ Roon Ready
▪ DSD128 (5.6MHz) and PCM 192kHz/24-bit Network streaming from NAS/PC
▪ 5 types of PCM digital lters and 2 types of DSD digital lters
▪ 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 bu󰀨er circuit and TEAC-QVCS volume control for high quality sound
▪ Dual toroidal-core power transformers
▪ Digital Isolator for separated digital and Analog sections
▪ 1/4” (6.3mm) stereo TRS jack supporting ground-separate drive
▪ “Bulk Pet” USB transferring technology with four transfer modes for various sound characters * “Bulk Pet” is a regis-
tered trademark of Interface Corporation.
▪ USB audio port for Hi-Res audio input from Windows/Mac
▪ Coaxial and optical digital inputs on both front and back
▪ Front USB port supporting Hi-Res playback from USB ash drive
▪ Analog outputs with balanced XLR and conventional unbalanced RCA outputs
▪ High-contrast full-graphic organic EL display with dimmer
▪ Full-metal body with an A4-sized footprint
▪ Free TEAC HR Audio Player for DSD512 and PCM32/768 playback
▪ Free TEAC HR Streamer app for iOS/Android devices
▪ Compliant with RoHS
MQAdecoderformasterqualitystreaming
In order to achieve an Analog 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 Analog waveforms with excellent precision (as ne 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-e󰀩ciency compression
algorithm makes huge Hi-Res audio les 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.
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 e󰀨ects on the audio signal. In addition, an external 10MHz clock input is also provided, to
synchronize with an even higher-precision master clock generator, such as the TEAC CG-10M, for yet further upgraded
audio playback with excellent sound quality.
Hi-ResaudioplaybackfromUSBashdrive
The USB port on the front panel allows you to playback Hi-Res audio formats including DSD128 (5.6MHz) and PCM
24/192.
Up-conversionupto
384kHz/32-bitPCMand
24.5MHzDSD
Employing RDOT-NEO
(Rened Digital Output Tech-
nology NEO), a uency algo-
rithm 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 isochro-
nous transfer mode, large variations can occur in the processing loads of the sending computer and the receiving USB
DAC. This can cause the sound to drop out and other problems to occur. However, with our new USB transmission tech-
nology - dubbed “Bulk Pet” - a xed amount of data is transmitted constantly, leveling out the processing burden on both
devices and contributing to stable data transmission. Changing the processing burden on the computer directly a󰀨ects
audio quality so users can select the setting they prefer (from four transmission modes). “Bulk Pet” is a registered trade-
mark 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/bulk-pet-enn
What’s in the Box
In your package you’ll nd the following contents:
▪ TEAC NT-505 USB DAC Network Player
▪ Remote
▪ Power Cord
▪ Manual
▪ Coaxial to Mini-Optical Adapter

Local Digital Source
If playing music from your computer, CD Transport, or Game Console
you have the following ports available: 1x Coaxial, 1x Optical, a USB type
B port on the back of the unit. There is also a shared optical/coax in on
the front of the device.
SETUP
Now let’s get started with the device setup!
▪ How will you play your music?
▪ What is your audio source?
Streaming
If streaming via Tidal, Qobuz, Spotify, Roon
(or any other service) you will be using
the Network option. This device has an
internal Wi, as well as an Ethernet port
for streaming. We strongly recommend
using the LAN connection for the best
experience. Wi can occasionally have
signal issues with all streaming devices.
This device also also has AptX bluetooth
for streaming from a local device (such as
your tablet or phone).
Storage
There is a USB type A port
of the front of the device
where you can play music
directly o󰀨 your thumb drive
or external hard drive.

Headphones
For Listening with headphones you have a singular 3.5mm
jack found on the front of the device. If your headphones do
not have a 3.5mm connector, you can purchase a custom
cable or an adapter from moon-audio.com.
Speakers
There are a pair of XLR and a pair RCA pre-amplied outputs found
on the back of the unit that can be used with a speaker amplier or
directly with active speakers.
* Remembertoturnthevolumedownwhenrstsettingupactivespeakers!

Powering On and Settings.
To turn the unit, make sure the power plug is plugged in securely, and then ip the power switch! On the front of the device
you have two knobs and a button. The large knob to the right just controls the volume of the device. The knob to the left of
the screen (labeled “source”) and the small button next to it (labeled “menu”) is how you will be able to change your device
settings. Just turning this knob will scroll through the inputs selection menu. Select the input you want by scrolling through
the options and then stopping on the source you wish to use. After a few seconds the NT505 will update accordingly.
Pressing in on the “menu” button will open your settings menu. Scroll through the settings with the “source knob” to select
the setting to modify.
Press the “Source” knob to select the setting to change. Turn the knob to select the option you want, and then press the
source knob in again to set your change.
The menu option are as follows:
Auto-Power Saving
▪ On- Device will go into standby after a period of inactivity.
▪ O󰀨- Device will stay on until turned o󰀨.
Version Info
▪ Displays current rmware and driver information for
your device
Upconvert
▪ Upconverts your music to sound like a higher resolu-
tion le
○ O󰀨
○ 2X ltering
○ 4x ltering
○ 8x ltering
DSD 256
DSD 512
DigitalFilter(PCM)
Changes the roll of and sound signature of this device.
▪ O󰀨 (No additional FIltering)
▪ Sharp roll o󰀨
▪ Slow roll o󰀨
▪ Short Delay Sharp
▪ Short Delay Slow
▪ Low Dispersion

DigitalFilter(DSD)
▪ Wide
▪ Narrow
ClockSync
If you have an external Master Clock, such as the TEAC CG 10M you can turn o󰀨 and on the Clock Sync function in this
menu.
More on Master clocks from TEAC: “Digital signals, such as PCM, are divided extremely nely into tens of thousands of parts per
second along the time axis. If that fundamental time axis uctuates during the process of D/A conversion it is much more di󰀩cult to
render an analogue audio waveform that is identical to the original. This is all the more true with DSD audio signals that function at
MHz speeds in the time axis. For this reason, having as accurate a clock signal as possible is very important for the re-creation of
digital audio signals, particularly HiRes les that use ultra high sampling-rates, such as DSD 22.5MHz or PCM 768kHz.”
LineoutSelect
Choose the line out, output you wish to use.
▪ RCA
▪ XLR
LineoutLevel
Adjust the volume of your pre amplied outputs.
▪ Fixed 0db
▪ Fixed +6db
▪ Variable
▪ O󰀨
Dimmer
Controls how much the screen dims (if at all) when the device has not been changed in awhile.
VolumeType
Steps 1 through 100
Decibels
DisplayType
What shows on your display when not in a menu!
▪ Volume
▪ Sample Frequency
Theapplication
TEAC has an app “HR Streamer” available via the App Store for iOS and in the Google Playstore for Android users. Using this app
you can remotely control this device provided that your tablet/phone is a on the same network connection as your TEAC NT 505.
Specications
TECHNICAL FEATURES
▪ USB Input:
▪ PCM: 16/24/32 bit; 44.1k/48k/88.2k/96k/176.4k/192k/352.8k/384k/705.6k/768k Hz
▪ DSD: 2.8M/5.6M/11.2M/22.5M Hz
▪ Coaxial digital input:
▪ PCM: 16/24 bit; 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz
▪ DSD: 2.8M/5.6M/11.2M/22.5M Hz
▪ Optical digital input:
▪ PCM: 16/24 bit; 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz
▪ DSD: 2.8M/5.6M/11.2M/22.5M Hz
▪ DAC Section:
▪ USB DAC: Asahi Kasei Microdevices AK4497×2
▪ Up-conversion: up to 384kHz/32-bit PCM, 22.5MHz DSD
▪ Digital lters-PCM lters: Sharp Roll O󰀨, Slow Roll O󰀨, Short Delay Sharp, Short Delay Slow, Low Dispersion, o󰀨

▪ Digital Filters-DSD cuto󰀨 frequencies:
○ Narrow : 39kHz (at 2.8M), 78kHz (at 5.6M), 156kHz (at 11.2M) or 312kHz (at 22.5M)
○ Wide : 76kHz (at 2.8M), 152kHz (at 5.6M), 304kHz (at 11.2M) or 608kHz (at 22.5M)
▪ LAN Section:
▪ Connector: RJ-45×1(1000Base-T)
○ MQA Decoder: Built-in
▪ Headphone outputs:
▪ Connector: 1/4” (3.5mm) Stereo TRS jack×1 (gold-plated)
▪ Maximum output: 500mW + 500mW (into 32Ω)
▪ Supported impedances: 16 to 600Ω
▪ Audio performance:
▪ Frequency Response: 10 to 80,000 Hz (+1/-3 dB, 192kHz PCM input, RCA output, digital lter o󰀨)
▪ Total harmonic distortion: 0.002% or less (192kHz PCM input, RCA output, digital lter o󰀨)
▪ S/N ratio: 110dB or higher (192kHz PCM input, RCA output, digital lter o󰀨)
PERFORMANCE
▪ Audio Inputs:
▪ USB (rear): USB B port, USB 2.0, asynchronous mode transfer, bulk transfer
▪ Compatible Software: TEAC HR Audio Player (Windows, Macintosh)
▪ COAXIAL digital (rear): RCA pin×1 (gold-plated)
▪ Input level: 0.5Vp-p
▪ Input impedance: 75Ω
▪ Optical digital (rear): TOS-link×1
▪ Input level: -24.0 to -14.5dBm peak
▪ Coaxial digital (front): 1/8” (3.5mm) mini×1 (combined with optical digital input, detected automatically)
▪ Input level: 0.5Vp-p
▪ Input impedance: 75Ω * 1/8” Mini - RCA conversion cable included
▪ Optical digital (front): 1/8” Mini Optical×1 (combined with coaxial digital input, detected automatically)
▪ Input level: -24.0 to -14.5dBm peak
▪ USB (front): USB A port
▪ Supported media: USB Flash Drive
▪ Bluetooth®: version 4.0
▪ Output class: Class2 (Range: approx. 33ft/10m)
▪ Supported proles: A2DP, AVRCP
▪ Content protection: SCMS-T
▪ Supported codec: LDAC™, Qualcomm® aptX™ HD, aptX™, AAC, SBC
▪ No. of paired devices: maximum 8 devices
▪ Audio outputs:
▪ XLR balanced: XLR×1 pair (gold-plated)
▪ Output level: Fixed (0dB), xed (+6dB), variable, output o󰀨 (selectable)
▪ Maximum output level:
▪ 2.0Vrms (1kHz, full scale, into 10kΩ, when set to xed (0dB))
▪ 4.0Vrms (1kHz, full scale, into 10kΩ, when set to xed (+6dB))
▪ 12.0Vrms (1kHz, full scale, into 10kΩ, when set to variable)
▪ Output impedance: 188Ω
▪ RCA unbalanced: RCA pin×1 pair (gold-plated)
▪ Output level: Fixed (0dB), xed (+6dB), variable, output o󰀨 (selectable)
▪ Maximum output level:
▪ 2.0Vrms (1kHz, full scale, into 10kΩ, when set to xed (0dB))
▪ 4.0Vrms (1kHz, full scale, into 10kΩ, when set to xed (+6dB))
▪ 6.0Vrms (1kHz, full scale, into 10kΩ, when set to variable)
▪ Output impedance: 150Ω
Review - https://www.moon-audio.com/teac-nt-505-review
Video - https://moon-audio.com/videos/v/teac-nt-505-product-guide-video/227382876