TEAC - UD-505-X USB DAC / Headphone Amplifier

Equipment Amplification Headphone Amp
Price $1,849.99
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TEAC - UD-505-X USB DAC / Headphone Amplifier

TEAC - UD-505-X USB DAC / Headphone Amplifier

Price $1,849.99
Availability:
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Description

TEAC UD-505-X USB DAC/Headphone Amplifier Offers Dual-Mono Circuit Design, Wireless Audio Streaming, Compact Size, and Seven Types of PCM Digital Filters

TEAC's decades of audio design expertise have led to the innovative UD-505-X, a class-leading dual monaural USB DAC with an integrated, fully balanced headphone amplifier. The UD-505-X incorporates a stunning array of technological advancements into a compact, 9.1-pound chassis. The dual-mono structure processes stereo signals with extreme purity, and the digital-to-analog converter section uses one ESS Technology ES9038Q2M converter in each of the left and right channels. The UD-505-X achieves a high signal-to-noise ratio by using each DAC in mono mode. This brilliant architecture preserves the sonic purity of your favorite tracks. Subtle sonic details—such as the breathing of a vocalist between verses, or the intricate textures of wooden instruments—will feel even more convincing.

If you enjoy wireless streaming with headphones, the UD-505-X is ready for action. The Bluetooth receiver supporting LDAC and Qualcomm aptX HD allows you to enjoy high-quality wireless audio streaming from your smartphone. Moreover, the unit's compact design allows it to be placed on a desk, side table, or crowded audio rack.

TEAC has engineered the unit to enable native playback of 22.5MHz DSD and 32-bit/768kHz PCM formats. The analog processing section, which is essential to audio quality, includes four premium TEAC-HCLD2 circuits (improved versions of the earlier TEAC-HCLD). For the headphone output—using the newly adopted diamond buffer circuit—in addition to two standard quarter-inch (6.3mm) connectors, one 4.4mm five-pole headphone connector is available, enabling balanced connection and active-ground connection with a single plug.

The design employs one DAC chip in each of the stereo channels. The ESS Technology ES9038Q2M SABRE32 Reference DAC that TEAC uses has a stellar reputation in the audiophile world. Using 32-bit HyperStream II DAC architecture and a Time Domain Jitter Eliminator, which are ESS original technologies, an outstanding dynamic range is realized and linearity is increased in the D/A conversion.

A dual-monaural circuit configuration is used throughout the design—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 music with rich, lifelike sonics.

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. The result is an improved signal-to-noise ratio and an extended dynamic range. Furthermore, this allows the fantastic sense of air that characterizes high-resolution formats to be processed and conveyed without any losses.

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

The UD-505-X is designed with seven types of PCM digital filters. This allows you to choose the best filter according to the input file format and type of music. Because the filter can be changed via the included remote control, you can easily enjoy the differences in the sonic nuances of each filter type. The unit can also be used with no enabled filters.

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 nearly identical sound to the original source by eliminating jitter effects on the audio signal. In addition, an external 10MHz clock input is provided, to synchronize with an even higher-precision master clock generator, such as the TEAC CG-10M/CG-10M-A, for even more enhanced playback with superb sound quality.

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 32-bit/384kHz PCM and 24.5MHz DSD. With the up-conversion function activated, you will hear a significant sonic improvement, even for tracks that you have heard dozens of times.

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

The UD-505-X utilizes line buffer ICs with extremely high-current output capacity. By using a positive-negative two-circuit structure for each channel, the drive can be differential with balanced output and parallel with unbalanced output. Transmitting audio signals without degrading their dynamism becomes possible with increased current-supply capacity.

The UD-505-X's headphone amplifier circuit provides balanced drive by using the TEAC-HCLD2 circuit—comprised of four output transistors for each left and right channel—for headphone output. The UD-505-X allows you to bring out the full potential of numerous types of headphones, including high-impedance models.

In addition to the dual conventional quarter-inch TRS jacks for balanced connection, the UD-505-X employs a 4.4mm five-pole headphone jack for balanced drive. With the quarter-inch TRS jack, you can enjoy three kinds of drive type, unbalanced connection to drive up to two sets of headphones, and active-ground drive that is effective to improve the silence.

The active-ground is a new driving mode that employs the principles of balanced connection. It forcefully drives the ground, by lowering the ground level to 0 volts, providing an ideal ground condition (rather than just connecting to the conventional ground). This means it also suppresses hum noise from the power supply and enhances the purity of silent pauses by lowering the noise floor.

The UD-505-X is equipped with both balanced and unbalanced analog audio outputs. A pair of XLR connectors and another pair of RCA connectors—each gold-plated—are symmetrically laid out, hinting at the dual monaural arrangement inside, and allowing a wide range of possible audio configurations. A wide-spaced pitch layout for the RCA outputs accommodates professional-grade plugs with large-diameter shells.

The UD-505-X has a total of five digital inputs: USB audio, coaxial, and optical on the rear panel, and a combination jack on the front panel, for coaxial and optical, supporting PCM 24-bit/192kHz and DSD64 (2.8MHz) in DoP format (DSD Over PCM).

High-resolution formats DSD512 (22.5MHz) and PCM 32-bit/768kHz are supported via the TEAC HR Audio Player software for Windows and Mac. This software guarantees the best available playback quality with any combination of audio format and computer configuration via a single USB cable. All you have to do is choose the UD-505-X from the pull-down menu showing target output devices. The TEAC HR Audio Player is downloadable from the TEAC website, and it is free. Like all Music Direct products, the TEAC UD-505-X comes with the 100% Music Direct Satisfaction Guarantee.

Stressless Foot Design

The new Stressless Foot design with three support points enables stable placement of the unit so that it is not impacted by slight irregularities in the surface beneath it. Compared to the feet used in previous designs, these feet are only partially fixed to the chassis. The tops of the conical feet, which are made of machined steel, are attached so that they hang from the bottom of the chassis and swing freely when the unit is lifted. While maintaining a secure sense of placement like that of the pinpoint spiked feet used by previous models, this design allows for better sonic performance.

Sturdy Metal Chassis

Because the entire chassis of the UD-505-X is constructed from metal panels that are resistant to external noise, intrusion of electromagnetic noise generated by computers and other devices is suppressed. A clean internal environment with little noise has been fully realized. Furthermore, 8mm-thick aluminum panels covering both sides of the all-metal chassis provide a strong, stable structure that prevents twisting and bending. Additionally, a semi-floating structure is now used for the top panel. It allows for a sound with an excellent sense of openness.

Quad Volume Control System

TEAC-QVCS (Quad Volume Control System) is used for the UD-505-X's volume circuit. This electronic volume control is a variable gain amp type comprised of four discrete circuits for left, right, positive, and negative. By placing the variable gain amp volume control (which processes in analog) in the audio signal path on the circuit board, issues with noise resulting from diverging wiring are avoided. Furthermore, this design enables volume adjustment in 0.5 decibel increments, allowing you to set the perfect volume for your system or headphones.

Proprietary "Bulk Pet" USB Transfer Technology

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, as well as other sonic glitches. However, with TEAC's USB transmission technology—called "Bulk Pet"—a fixed amount of data is transmitted constantly, levelling out the processing burden on both devices, allowing for stable data transmission. Changing the processing burden on the computer directly affects audio quality so you can select the setting you prefer (from among four transmission modes).

Highlights
  • Hi-Res audio playback supporting DSD512 (22.5MHz) and PCM 768kHz/32bit PCM
  • An ESS Technology ES9038Q2M converter each for left and right channels
  • Dual on-board clocks for 44.1kHz and 48kHz frequencies
  • 7 types of PCM digital filters
  • Up-conversion up to 24.5MHz DSD and 384kHz/32bit PCM
  • 10MHz external clock input
  • Bluetooth receiver supporting LDAC, Qualcomm aptX HD, AAC and SBC
  • Original TEAC-HCLD2 enhanced-current output buffer circuit
  • Dual monaural circuit design
  • Dual toroidal-core power transformers for each channel
  • TEAC-QVCS quad volume control system
  • 4.4mm 5-polar Pentaconn jack and dual 1/4" (6.3mm) TRS jacks for balanced and active-ground drives
  • Full-dot OLED display with dimmer function
  • Newly-developed "Stressless Foot" design with three support points
  • Semi-floating design Top Panel
  • Bulk Pet USB transferring technology with four transfer modes for various sound characters
  • Free TEAC HR Audio Player for Windows/Mac
Read More

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)
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)
USB DAC: ESS Technology ES9038 Q2M x 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 x 1 (gold-plated)
   Input level: 0.5Vp-p
   Input impedance: 75Ω
Optical digital (rear): TOS-link x 1
   Input level: -24.0 to -14.5dBm peak
Coaxial digital (front): 1/8" (3.5mm) mini x 1 (combined with optical digital input, detected automatically)
   Input level: 0.5Vp-p
   Input impedance: 75Ω
Optical digital (front): 1/8" Mini Optical x 1 (combined with coaxial digital input, detected automatically)
   Input level: -24.0 to -14.5dBm peak
Analog (rear): RCA pin x 1 pair (gold-plated)
   Input impedance: 24kΩ
   Input sensitivity: 130mV
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
XLR balanced: XLR x 1 pair (gold-plated)
   Output level: Fixed (0dB), fixed (+6dB), variable, output off (selectable)
   Maximum output level:
      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 x 1 pair (gold-plated)
   Output level: Fixed (0dB), fixed (+6dB), variable, output off (selectable)
   Maximum output level:
      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 x 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 x 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 x 1)
      350mW + 350mW(into 32Ω x 2)
   Active ground: 500mW + 500mW (into 32Ω)
Supported impedances: 16 to 600Ω
Internal clock type: Crystal oscillator
   Number of clocks: 2 (44.1kHz and 48kHz)
   External clock input: 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
Power supply: AC 120V 60Hz
Power consumption: 18W (0.4W in standby)
Dimensions (WHD): 11.4" x 3.3" x 9.8"
Weight: 9.1 lbs.
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)

User Manual (PDF, 1.4 MB)

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