UD-505-X

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.

 

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    
US/Canada    AC 120V 60Hz
UK/Europe    AC 220 to 240V 50Hz
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