TEAC UD-505-X USB DAC / HEADPHONE AMPLIFIER

$2,299.99

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Product Details

Condensed high-end audio design philosophy and audio design know-hows learned from over 6 decades of our experience in a small cabinet as small as an A4-sized footprint.

 The UD-505-X is a class-leading dual monaural USB DAC with an integrated fully-balanced headphone amplifier,
that fuses high-end audio design concepts and TEAC’s decades of audio design experience, in an A4-sized footprint.
The dual mono structure processes stereo signals with higher purity, and the D/A converter section uses one ESS Technology ES9038 Q2M in each of the left and right channels.

This model achieves a high signal-to-noise ratio by using each DAC in mono mode.
Moreover, we upgraded it with high specifications that enable native playback of
22.5MHz DSD and 768kHz/32bit PCM formats. In the analog processing section,
which can be considered the key to audio quality, we include four TEAC-HCLD2 circuits.
These are improved versions of our previous TEAC-HCLD. For headphone output using the newly-adopted diamond buffer circuit, in addition to two standard 6.3mm connectors, one 4.4mm 5-pole headphone connector is available, enabling balanced connection and active ground connection with a single plug.

The Bluetooth® receiver supporting LDAC and Qualcomm® aptX HD allows you to enjoy high-quality wireless audio streaming from your smartphone on this reference USB DAC.

 

ESS Technology ES9038 Q2M high-performance DAC supports resolutions up to 22.5MHz DSD and 768kHz/32bit PCM

We have employed one DAC chip, which is a crucial component for digital audio, in each of the stereo channels. The ESS Technology ES9038Q2M SABRE32 Reference DAC that we use has a strong reputation in the high-end audio market. Using 32-bit HyperStream® II DAC architecture and Time Domain Jitter Eliminator, which are ESS original technologies, an outstanding dynamic range is realized and linearity is increased in the D/A conversion. As a result, clear and accurate audio playback with superior.

UD-505-X
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 Analog output stage. From the high-performance 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 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.

High-quality wireless audio streaming via Bluetooth®

In addition to conventional SBC and AAC codecs, the UD-505-X also supports LDAC (24bit/96kHz Hi-Res audio transmission), and Qualcomm® aptX HD, a codec that uses 24bit/48kHz format transmission. These allow you to playback playlists on your smartphone and tablet wirelessly.

UD-505-X
Dual onboard clocks for 44.1kHz 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 UD-505-X 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 synchronize with an even higher-precision master clock generator, such as the TEAC CG-10M/CG-10M-A, for yet further upgraded audio playback with excellent sound quality.

UD-505-X
Up-conversion up to 384kHz/32bit PCM and 24.5MHz DSD

Employing RDOT-NEO (Refined Digital Output Technology NEO), a fluency algorithm that renders digital audio signals smoothly, the UD-505-X up-converts PCM digital signals up to 384kHz/32bit 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.

UD-505-X
"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).

UD-505-X
Seven types of PCM digital filter

Seven types of PCM digital filters are available in this model. This allows you to choose the best filter according to the input file format and music style. Since the filter can be changed with a single operation of the included remote control, you can easily enjoy the differences in the subtle sound nuances of each filter type. The unit can also be used with no enabled filters.

Dual high-capacity toroidal-core power transformers

The dual monaural theme continues. Two over-sized high-capacity toroidal-core power transformers are employed in the UD-505-X, supplying stable, individual current sources for each of the left and right channels. This means neither channel will be affected by changes in the power consumption of the other during digital processing.

 

SPECIFICATIONS

Spec description

Supported formats  
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 2.8MHz(supported with 176.4kHz/24-bit DoP format)
Optical digital input  
PCM 16/24 bit
32k/44.1k/48k/88.2k/96k/176.4k/192k Hz
DSD 2.8MHz(supported with 176.4kHz/24-bit DoP format)
DAC section  
USB DAC ESS Technology ES9038 Q2M ×2
Up-conversion up to 384kHz/32-bit PCM, 24.5MHz DSD
Audio inputs  
USB 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
Analog (rear) RCA pin ×1 pair (gold-plated)
Input impedance 24kΩ
Input sensitivity 130mV
Bluetooth®  
Bluetooth® version 4.0
Output class Class2 (Range: approx. 33ft/10m)
Supported profiles A2DP, AVRCP
Content protection SCMS-T
Supported codec LDAC™, Qualcomm® aptX™ HD, aptX™, AAC, SBC
No. of paired device maximum 8 devices
Audio outputs  
XLR balanced XLR ×1 pair (gold-plated)
Output level Fixed (0dB), fixed (+6dB), variable, output off (selectable)
Maximum output leve 2.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (0dB))
4.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (+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), fixed (+6dB), variable, output off (selectable)
Maximum output leve 2.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (0dB))
4.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (+6dB))
6.0Vrms (1kHz, full scale, into 10kΩ, when set to variable)
Output impedance 150Ω
Headphone outputs  
Connector 1 1/4” (6.3mm) TRS stereo jacks ×2 (gold-plated)
Polarity (balanced) Tip: HOT, Ring: COLD, Sleeve: NC (GND)
Polarity (unbalanced) Tip: L, Ring: R, Sleeve: GND
Connector 2 4.4mm 5-pole Pentaconn ×1 (gold-plated)
Polarity (balanced) Tip: L+, Ring1: L-, Ring2: R+, Ring3: R-, Sleeve: GND
Maximum output  
Balanced 700mW + 700mW (into 32Ω)
Unbalanced 500mW + 500mW (into 32Ω×1)
350mW + 350mW(into 32Ω×2)
Active ground 500mW + 500mW (into 32Ω)
Supported impedances 16 to 600Ω
Clock section  
Internal clock  
Type Crystal oscillator
Number of clocks 2 (44.1kHz and 48kHz)
External clock input  
Connector BNC (gold-plated)
Input frequency 10MHz
Input impedance 50Ω
Input level Rectangle wave: equivalent to TTL levels
Sine wave: 0.5 to 1.0 Vrms
Audio performance  
Frequency Response 10 to 80,000 Hz (+1/–3 dB, 192kHz PCM input, RCA output, digital filter off)
Total harmonic distortion 0.002% or less (192kHz PCM input, RCA output, digital filter off)
S/N ratio 110dB or higher (192kHz PCM input, RCA output, digital filter off)
Power supply  
  AC120V, 60Hz
  AC220 - 240V, 50/60Hz
Power consumption 18W (0.4W in standby)
dimensions (including protrusions) 290(W)×84.5(H)×248.7(D) mm / 11.4”(W)×3.3”(H)×9.8”(D)
Weight 4.1kg / 9.1lbs
Included accessories Power cord, RCA mini plug adapter cable, remote control(RC-1330), 2 AAA batteries for remote control, 3 feet cushions, Owner's Manual(with warranty)

 

Up-conversion table

Input Frequency Up-converted Frequency
Coax/Opt USB off 2Fs 4Fs 8Fs DSD256 DSD512
32kHz - 32kHz 64kHz 128kHz 256kHz 8MHz 16MHz
44.1kHz 44.1kHz 44.1kHz 88.2kHz 176.4kHz 352.8kHz 11.2MHz 22.5MHz
88.2kHz 88.2kHz 88.2kHz 88.2kHz 176.4kHz 352.8kHz 11.2MHz 22.5MHz
176.4kHz 176.4kHz 176.4kHz 176.4kHz 176.4kHz 352.8kHz 11.2MHz 22.5MHz
- 352.8kHz 352.8kHz 352.8kHz 352.8kHz 352.8kHz 11.2MHz 22.5MHz
- 705.6kHz 705.6kHz 705.6kHz 705.6kHz 705.6kHz 11.2MHz 22.5MHz
48Hz 48Hz 48kHz 96kHz 192kHz 384kHz 12.2MHz 24.5MHz
96kHz 96kHz 96kHz 96kHz 192kHz 384kHz 12.2MHz 24.5MHz
192kHz 192kHz 192kHz 192kHz 192kHz 384kHz 12.2MHz 24.5MHz
- 384kHz 384kHz 384kHz 384kHz 384kHz 12.2MHz 24.5MHz

-

768kHz 768kHz 768kHz 768kHz 768kHz 12.2MHz 24.5MHz
No conversion
* Maximum up-conversion rate is 8Fs.

 

Comparison with previous models

  UD-505-X UD-505 UD-503 UD-501
USB DAC ES9038 Q2M ×2 (L/R) AK4497 ×2 (L/R) AK4490 ×2 (L/R) PCM 1795 ×2 (L/R)
Supported DSD formats 22.5MHz maximum 22.5MHz maximum 11.2MHz maximum 5.6MHz maximum
Supported PCM formats 768kHz/32-bit maximum 768kHz/32-bit maximum 384kHz/32-bit maximum 384kHz/32-bit maximum
Up-conversion (Max) DSD: 24.5MHz (DSD 256, 512)
PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs)
DSD: 24.5MHz (DSD 256, 512)
PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs)
DSD: 12.2MHz (DSD 256)
PCM: 384kHz/32-bit (2 fs, 4 fs, 8 fs)
PCM: 192kHz/24-bit (fixed)
Dual monaural Yes Yes Yes Yes
Current buffer circuit TEAC-HCLD2 TEAC-HCLD TEAC-HCLD -
TEAC QVCS circuit
(High-precision volume)
Yes Yes Yes -
Line/balanced outputs Yes Yes Yes Yes
Line parallel/
unbalanced outputs
Yes Yes Yes Yes
High-precision dual clock Yes Yes Yes Yes
External clock input Yes Yes Yes -
Preamplifier function Yes Yes Yes -
Bulk Pet transmission Yes Yes - -
Line output level switching
  • Fixed (0 dB)
  • Fixed (+6 dB)
  • Variable
  • Off
  • Fixed (0 dB)
  • Fixed (+6 dB)
  • Variable
  • Off
  • Fixed (0 dB)
  • Fixed (+6 dB)
  • Variable
  • Off
-
(Line output on/off selection only when headphones connected)
Front digital input Yes
(Combined coaxial/optical mini jack)
Yes
(Combined coaxial/optical mini jack)
Yes
(Combined coaxial/optical mini jack)
-
Analog line inputs 1 pair (RCA) 1 pair (RCA) 1 pair (RCA) -
Bluetooth® receiver Yes Yes - -
Headphone amplifier circuit Current-strengthening circuit Current-strengthening circuit Current-strengthening circuit Op-amp
Headphone output connectors/
drive modes
4.4mm 5-pole ×1
  • Balanced
  • Active ground
Standard 6.3mm ×2
  • Balanced
  • Active ground
  • Unbalanced
4.4mm 5-pole ×1
  • Balanced
  • Active ground
Standard 6.3mm ×2
  • Balanced
  • Active ground
  • Unbalanced
Standard 6.3mm ×2
  • Balanced
  • Active ground
  • Unbalanced
3.5mm stereo mini ×1
  • Unbalanced
Feet Stressless Pin-point foot Pin-point foot Pin-point foot Conventional insulated foot
Remote control Yes Yes Yes -

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