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Teac UD-503B
USB DAC Headphone Amplifier, Black

OUR PART #:  UD-503B

The TEAC UD-503 is a dual-monaural USB DAC that supports 11.2 MHz DSD with built-in fully-balanced / parallel-unbalanced headphone amplifier.
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List Price: $1,199.99
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The TEAC UD-503 is a dual-monaural USB DAC that supports 11.2 MHz DSD with built-in fully-balanced / parallel-unbalanced headphone amplifier.

TEAC UD-503 Features:

  • USB DAC that supports 11.2MHz DSD and 384 kHz /32-bit PCM
  • Dual-monaural circuit structure used from the power supply to the digitaland analog sections
  • Both left and right channels have their own high-end AK4490 DACs
  • Two high-capacity toroidal core power transformers—one each for left andright channels
  • Isolation circuit that completely separates the digital and analogsections electrically
  • (4) TEAC HCLD buffer amplifiers, which are current-enhancing output buffercircuits, are used for the line amplifiers
  • Up-conversion to formats up to 12.2 MHz DSD and 384 kHz / 32-bit PCM usingan FPGA (programmable IC) that utilizes a fluency function
  • Two types of DSD filter and four types of PCM digital filter, as well asan OFF mode
  • 10 MHz external clock input supported (available during USB asynchronoustransmission)
  • Two high-precision internal clocks—one each dedicated to 44.1 kHz and 48kHz signals (available during USB asynchronous transmission)
  • One pair of RCA analog unbalanced inputs
  • Volume output can be set to fixed, fixed +6 dB or variable for the onepair of XLR analog balanced outputs and one pair of RCA analog unbalancedoutputs
  • XLR jack polarity can be set (2 HOT or 3 HOT)
  • TEAC QVCS high-precision volume circuit
  • Large digital volume display with excellent visibility and remote controlwith one-button operation of various functions
  • OELD display shows input signal type and various settings (with 3-leveldimmer and off functions)
  • Fully-balanced drive headphone amplifier with discrete construction andmaximum output of 700 mW and 700 mW
  • Headphone amplifier can be switched among 3 drive types: unbalanced,balanced and active ground
  • Digital inputs on the back include one USB, one coaxial and one optical
  • Combined coaxial mini / optical mini digital input connector on front isconvenient for digital input from portable devices
  • Low power consumption design and automatic power saving function meetmodern expectations
  • The full-metal body realizes both vibration control and elegant style inan A4-size body that enables placement on a desktop
  • TEAC original design for three-point support using pinpoint feet withattached bases
  • Compliant with RoHS

TEAC UD-503 Specifications:

  • Digital Audio Input
    • Coaxial:
      • Connector:
        • RCA jack x 1
        • 1/8" (3.5 mm) Mini jack x 1 (compatible with Optical Input)
      • Input Level: 0.5 Vp-p
      • Input Impedance: 75 ohms
      • Supported Format: DSD, PCM
      • DSD: 2.8 MHz (176.4 kHz / 24 bit DoP transfer)
      • PCM: 32 k / 44.1 k / 48 k / 88.2 k / 96 k / 176.4 k /192 kHz, 16 / 24 bit
    • Optical:
      • Connector:
        • TOS link x 1
        • 1/8" Mini Optical jack x 1 (compatible with Coaxial Input)
      • Input Level: –24.0 to –14 / 5 dBm peak
      • Supported Format: DSD, PCM
    • USB:
      • Connector: USB B type x 1
      • Supported Format: DSD, PCM
  • Analog Audio Input
    • Connector: RCA jack x 1 pair
    • Input Impedance: 51 k ohms
    • Sensitivity: 130 mV
    • Analog Audio Output
    • Connectors:  
      • Balanced: XLR 3-32 x 1 pair
      • Unbalanced: RCA jack x 1 pair
    • Output Impedance:
      • Balanced: 188 ohms
      • Unbalanced: 150 ohms
    • Max Output Level:
      • Fixed (0 dB): 2.0 Vrms (XLR/RCA)
      • Fixed (+6 dB): 4.0 Vrms (XLR/RCA)
      • Variable: 12.0 Vrms (XLR), 6 Vrms (RCA)
  • Frequency Response: 5 Hz to 80 kHz (+1 dB / –3 dB)
  • Power Consumption: 16 Watts (0.4 Watts at Standby Mode)
  • Overall Dimensions (including protrusions) (W x H x D): 11.4 x 3.2 x 9.8 in (290 x 81.2 x 248.7 mm)
  • Weight: 9.3 lbs (4.2 kg)

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