Features
High-Performance Amplification: Tailored for desktop use, it provides an amplified audio signal to both headphones and powered speakers.
Precise Volume Control: Direct volume adjustment from your computer or device, ensuring accurate sound levels without imbalance.
Dedicated Outputs: Features separate outputs for headphones and powered speakers or AV receivers, designed for a comprehensive desktop audio setup.
Premium Build Quality: Boasts custom audiophile-grade RCA connectors and a durable aluminum case for a long-lasting desktop audio solution.
Superior Sound Quality: Delivers sound quality typically found in more expensive DACs, making it a perfect choice for a wide range of high-end headphones and speakers.

Inputs
USB-C/Optical (SPDIF)

Outputs
RCA/Mini Jack

D/A converter
ESS ES9018 DAC

Optical receiver
ESS9018

USB controller
CT7601CR

USB
USB Audio 2.0

Full-scale output
2.0V RMS

Output impedance
4.7 ohm

Power source
5V USB

Power requirements
110mA/5VDC

USB power filtering
SG2019

SNR
>105dB

THD+N
<0.0025% @ 1KHz

Crosstalk
-46dB

Frequency response
20-20KHz

Input bit depth
up to 32 bits

Input data rate
up to 394kHz

Product dimensions
90x74x22mm

Shipping weight
268x175x56mm

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
Setup guide
Microfiber bag

D1 DAC
The D1 uses the ESS ES9018 DAC, which is well regarded for its low noise and high fidelity. Due to the high signal-to-noise specs of the ES9018 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 32-bits and any sample rate up to 394kHz

D1 Headphone Amplifier
The D1 includes the ES9601C SABRE headphone driver amp with circuit protection and is designed for a wide range of headphones that will satisfy even the most critical listeners.

D1 Power
The D1 is powered directly from the USB input and passed through two stages of regulation to ensure no USB power variations affect the audio quality. Because of the efficiency of the D1, it can even be powered by a phone or tablet.

D1 Preamp
The audio line-out preamp connects to powered speaker systems, amplifiers, or other external decoders with an analog or optical output.

D1 Volume Control
Volume for headphones and line-out is controlled directly from the D1 front panel via the digitally-controlled analog potentiometer. Smoothly adjust volume levels at fine increments without any undesirable noise or channel imbalance at lower volu