DAC type
USB and Optical
Inputs
USB Audio
S/PDIF Optical
D/A converter
ESS ES9018
USB transfer mode
Asynchronous dual clock
USB controller
CT7601CR USB streamer
USB device class
Type 1.1 or above
Input bit depth
Up to 24 bits
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
ES9601C SABRE
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
Power requirement
USB 5V DC, 200mA
USB power filtering
2-stage redundant regulation
Product dimensions
3.5″ (8.9 cm) x 3.75″ (9.5 cm) x 1″ (2.5 cm)
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
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 24-bits and any sample rate up to 96kHz (192kHz using optical)
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 volumes.