DAC3 Headphone Amplifier


UPC: 852225007339
  • General Specifications

    DAC type



    USB audio

    D/A converter

    ESS ES9281A PRO

    USB transfer mode

    Asynchronous dual clock

    USB controller


    USB device class

    Type 1.1 or above

    Input bit depth

    32 bit

    Input sample rate

    44.1kHz-96kHz native playback

    188.2kHz & 192kHz re-sampled to 96kHz


    Analog 3.5mm mini-jack stereo

    Full-scale output level

    2.0V RMS

    Output impedance

    2 ohms

    Recommended headphone impedance range

    12 ohms to 10K ohms

    Headphone amplifier


    Frequency response

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




    (1kHz FS 96kS/s) <0.002%



    Power requirement

    USB 5V DC, 200mA

    USB power filtering

    2-stage redundant regulation

    Product dimensions 

    1.9” (48mm) ×0.6” (15mm) ×0.375″ (10MM) 

    Shipping weight

    1.0lbs (0.5kg)


    Operating Temperature: 32 to 95 degrees F

    Non-operating Temp: -4 to 113 degrees F

    Relative Humidity: 5% to 95% non-condensing

    Included accessories

    Lightning to USB-C and USB-C cables

    Setup guide

    DAC3 Internal Converter

    The heart of the DAC3 is the ES9281A PRO DAC, which is well-regarded for its low noise and high fidelity. Due to the high signal-to-noise specs of the ES9281A PRO and the added benefit of double redundancy power source conversion and filtering, the DAC3 presents impressive low noise and low distortion characteristics. The DAC3 can process digital audio at any bit depth up to 32 bits and any sample rate up to 192kHz. DAC3 pads (upsampled) all bit depths internally to 32-bits, thus achieving a higher signal-to-noise ratio.

    DAC3 Headphone Amplifier

    The DAC3 contains a high-performance headphone amplifier based on the LME49726 low-noise opamp. This amp is able to provide low-impedance, high-fidelity audio and a 2-volt output which easily drives a wide range of headphones, satisfying even the most demanding headphone enthusiasts. The DAC3’s relay-controlled stereo output can also be connected to any system with an analog audio input, such as Audioengine powered speakers.

    DAC3 Power

    The DAC3 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. This low-noise, low-ripple power supply is located on a separate circuit board for extra isolation and thermal management.

    DAC3 Volume Control

    Volume for headphones and line-out is controlled directly from the DAC3 side panel. Smoothly adjust volume levels at fine increments without any undesirable noise or channel imbalance at lower volumes.