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


  • 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


* 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.

Photo shows option board installation exampe 

Connection example of DAC-50

Connection example of DAC-40

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