ESS ES9281A PRO
USB transfer mode
Asynchronous dual clock
USB device class
Type 1.1 or above
Input bit depth
Input sample rate
48.1kHz-96kHz native playback
188.2kHz & 192kHz re-sampled to 96kHz
Analog 3.5mm mini-jack stereo
Full-scale output level
Recommended headphone impedance range
12 ohms to 10K ohms
10Hz-25KHz (+/- 0.5dB)
(1kHz FS 96kS/s) <0.002%
USB 5V DC, 200mA
USB power filtering
2-stage redundant regulation
1.9” (48mm) ×0.6” (15mm) ×0.375″ (10MM)
Operating Temperature: 32 to 95 degrees F
Non-operating Temp: -4 to 113 degrees F
Relative Humidity: 5% to 95% non-condensing
Lightning to USB-C and USB-C cables
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.
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.