Product Details

The DAC-50 is an optional digital input board that supports a broad range of digital sound sources and is equipped with a high-precision MDS type D/A converter for optimal sound quality. The converter uses AK4490EQ chips from Asahi Kasei Microdevices in a double parallel configuration per channel. Installing the board in a slot on the rear panel of a supported Accuphase component provides direct input capability for signals from digital components for high-grade playback. Three types of inputs are provided: USB (Type B), OPTICAL (for optical fiber cable), and COAXIAL (for coaxial cable). The USB input handles signals up to 11.2 MHz / 1-bit 【DSD】 and 384 kHz / 32-bit【 PCM】, the coaxial input supports up to 192 kHz / 24-bit and the optical input up to 96 kHz / 24-bit.


Product Specifications:

  • Function

    • An automatic change of the coax input / optical fiber /USB input
    • Automatic recognition of number of sampling frequency /bit /MHz de-emphasis


  • Guaranteed specifications

      • USB:USB 2.0 High Speed (480Mbps) compliant
                  :Sampling frequency DSD/2.8224MHz,5.6448MHz,11.2896MHz(1bit)
                            *11.2896MHz(ASIO only)
                  :PCM/ 32kHz~384kHz,32bit
      • OPTICAL:JEITA CP-1212 compliant
                  :Sampling frequency 32kHz~96kHz, 24bit
      • COAXIAL:IEC 60958/AES-3 compliant
            :Sampling frequency 32kHz~192kHz, 24bit

    • About sampling frequency display
      when DAC-50 is installed in C-2120, E-600, E-470, E-370, or E-270

      Sampling frequencies up to 192 kHz are shown as is.
      Signals with the following sampling frequencies are handled without problem,
      but the indication is always "192.0 kHz":
      【DSD】 2.8224 MHz, 5.6448 MHz, 11.2896 MHz
      【PCM】 352.8 kHz – 384 kHz


    * The reproduction of music data by the USB depends on OS on the PC and softwareof music reproduction.

    * Please refer to the manual of the PC for setting and the connection method of the PC about USB.


  • Supplied accessories

    • USB Utility CD-ROM

  • Connection

    * If multiple input signals are supplied at the sametime, the unit automatically locks onto a signal when"OPTION 1" is selected, using the following priority sequence: COAXIAL → OPTICAL → USB

    * To exclude a signal from being selected, either disconnect the cable or turn power of the respective equipment off.


  • Photo shows option board installation exampe.



  • Connection example of DAC-50

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