• GENERAL SPECIFICATIONS
     

    DAC type
    USB and Optical

    Inputs
    USB audio
    SPDIF Optical

    D/A converter
    AKM4396

    USB transfer mode
    Asynchronous dual clock

    USB controller
    TI1020B

    USB device class
    Type 1.1 or above

    Input bit depth
    16 bit, 24 bit

    Input sample rate (USB)
    32kHz-96kHz native playback
    188.2kHz & 192kHz re-sampled to 96kHz

    Input sample rate (optical)
    32kHz-192kHz native playback

    Outputs
    Analog RCA L/R stereo
    Analog 3.5mm mini-jack stereo

    Full-scale output level
    2.0V RMS

    Output impedance
    2 ohms

    Recommended headphone impedance range
    10 ohms to 600 ohms

    Headphone amplifier
    OPA2134

    Optical receiver
    CS8416

    Frequency response
    10Hz-25KHz (+/- 0.5dB)

    SNR
    (DC to 20 kHz) >110dB

    THD+N
    (1kHz FS 96kS/s) <0.0025%

    Crosstalk
    -85db

    Input bit depth
    16 bit, 24 bit

    Input sample rate (USB)
    32kHz-96kHz native playback
    188.2kHz & 192kHz re-sampled to 96kHz

    Input sample rate (optical)
    32kHz-192kHz native playback

    Power requirement
    USB 5V DC, 200mA

    USB power filtering
    2-stage redundant regulation

    Product dimensions
    3.5×3.75×1″ (89x95x25mm)

    Shipping weight
    1.0lbs (0.5kg)

    Environmental
    Operating Temperature: 32 to 95 degrees F
    Non-operating Temp: -4 to 113 degrees F
    Relative Humidity: 5% to 95% non-condensing

    Included accessories
    USB cable, 2ft
    Setup guide
    Microfiber bag

    D1 Internal Converter
    The D1 uses the AK4396 DAC, which is well-regarded for its low noise and high fidelity. Due to the high signal-to-noise specs of the AK4396 and the added benefit of double redundancy power source conversion and filtering, the D1 presents impressive low noise and low distortion characteristics. The D1 can process digital audio at any bit depth up to 24-bits and any sample rate up to 192kHz.

    D1 Headphone Amplifier
    The D1 includes a headphone amp based on the TI OPA2134 low noise opamp. The high-performance headphone output was designed for a wide range of headphones and will satisfy even the most demanding headphone enthusiasts.

    D1 Power
    The D1 is powered directly from the USB bus and power is passed through two stages of regulation to ensure no USB bus power variations affect the audio quality.

    D1 Volume Control
    Volume is controlled directly from the D1 front panel via the digitally-controlled analog potentiometer.

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