• Multifunction U8 : with USB/ Bluetooth/ Optical/ Coaxial/ IIS 5 kinds of digital inputs, can satisfy most home digital audio device demands, compatible with phone, tablet, computer, digital player etc. Besides stereo RCA and balanced XLR outputs, also adds single-ended (3.5mm) and balanced (XLR / 4.4mm) headphone outputs, HiFi music can be easily enjoyed day and night.
• High-end chips are used and unique structure are adopted: XMOS XU208 USB chip with ultra-high decoding ability, supporting 32Bit/PCM 384KHz and DSD256 format playback, IIS input even support 768KHz and DSD512.
  
  Dual ESS9038Q2M decoding chip in parallel for both channel, achieve 0.0007% ultra-low distortion and 118dB high SNR, greatly improve the sound quality for preamp / amplifier / speakers.
  
  QCC5125 Bluetooth chip, supporting ACC/SBC/APTX/APTX-LL/APTX-HD/LDAC, 24bit/96Khz lossless transmission can be achieved to reproduce high-quality music.
  
• Considerate design details for convenient use: with 7 types of filter modes to select and enjoy different sound styles. OLED display screen to show all parameters at real-time, equipped with remote control to adjust all settings from a distance.
• Proper size and attractive appearance: both compact and powerful, customized moulding aluminum alloy chassis and special big knob on the top panel looks pure and elegant, amazing combinatino of waved pattern on the left and acrylic board on the right, match perfectly with your home / studio / office desktop audio system.

• Audio input: Bluetooth / USB / IIS / Coaxial / Optical
• Audio output: stereo RCA / balanced XLR / 3.5mm headphone jack / 4-core XLR headphone jack / 4.4mm XLR headphone jack
• Formats and sampling rate supported:
  IIS input: PCM 44.1K-384K/32bit DSD64-DSD512 native
  Coaxial input:PCM 44.1K-192K/24bit DSD64 DOP
  Optical input: PCM 44.1K-192K/24bit DSD64 DOP
  USB input：PCM 44.1K-384K/32bit DSD64-DSD256 native
• Bluetooth： APTX-HD/ LDAC/ APTX-LL/ APTX-L/ AAC/ SBC
• Working voltage: DC 5V/2A
• Dimensions(W*D*H): 159*90*37mm / 6.26*3.54*1.46in
• Package dimensions(W*D*H): 258*214*60 / 10.16*8.43*2.36in
• Net weight: 634g / 1.40lb
• Package weight: 1.1kg / 2.43lb
• LINE Output Parameters
  
  RCA line out
  Distortion: 0.0007
  S/N ratio（A-wt) 1KHz: 122dB
  Dynamic range（A-wt) 1KHz: 122dB
  Frequency response: 20Hz-20KHz（±0.1dB) / 20Hz-40KHz（±0.3dB)
  Audio output level: 2V RMS
  Stereo crosstalk: -110 dB
  Stereo level error: 0.1dB
  Output internal resistance: 33Ω
  
  XLR line out
  Distortion: 0.0007
  S/N ratio（A-wt) 1KHz: 122dB
  Dynamic range（A-wt) 1KHz: 122dB
  Frequency response: 20Hz-20KHz（±0.1dB) / 20Hz-40KHz（±0.3dB)
  Audio output level: 3.95V RMS
  Stereo crosstalk: -110 dB
  Stereo level error: 0.1dB
  Output internal resistance: 66Ω
• Headphone Output Jack
  
  3.5mm headphone jack
  Distortion: 0.002 @32Ω 100mW
  Max output power: 125mW@32Ω
  S/N ratio（A-wt) 1KHz:120dB
  Dynamic range（A-wt) 1KHz:120dB
  Frequency response: 20Hz-20KHz(±0.1dB) 20Hz-40KHz(±0.3dB)
  Audio output amplitude: 5.3V-PP
  Stereo crosstalk: -90 dB
  Output internal resistance: 10Ω
  Matched headphone impedance: 16-150 Ω
  
  4.4 XLR headphone jack
  Distortion: 0.002 @32Ω 100mW
  Max output power:150mW@300Ω
  S/N ratio（A-wt) 1KHz:120dB
  Dynamic range（A-wt) 1KHz:120dB
  Frequency response: 20Hz-20KHz(±0.1dB) 20Hz-40KHz(±0.3dB)
  Audio output amplitude: 10.7V-PP
  Stereo crosstalk: -90 dB
  Output internal resistance: 20Ω
  Matched headphone impedance: 16-300 Ω
  
  4-core XLR headphone jack
  Distortion: 0.002 @32Ω 100mW
  Max output power: 150mW@300Ω
  S/N ratio（A-wt) 1KHz: 120dB
  Dynamic range（A-wt) 1KHz:120dB
  Frequency response: 20Hz-20KHz(±0.1dB) 20Hz-40KHz(±0.3dB)
  Audio output amplitude: 10.7V-PP
  Stereo crosstalk: -90 dB
  Output internal resistance: 20Ω
  Matched headphone impedance: 16-300 Ω
  
  

User Manual of Douk Audio U8

• Killer DAC under $300? Look no further - Douk Audio U8——Reviewed by @Rick Ruiz Audio
• Douk Audio U8 Reviewed by@Valeron's Vinyl Channel VVC