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851D Reference DAC & Digital Preamp


AU$1699
Model: 851D


Product Overview:

Draw every last detail from digitally stored music!

The Azur 851D is for those who want to store their music digitally, but with no compromise on sound quality. With a comprehensive range of connections and high-end componentry designed to draw the best from any digital source, it delivers your digital music in upsampled, stunning quality. The 851D is the last word in high-end digital-analogue conversion.

ATF2 upsampling – All stereo sources can be upsampled to 24-bit/384kHz, kept jitter-free by proprietary, second generation ATF Adaptive Time Filtering algorithms co-developed with Anagram Technologies of Switzerland.

Digital inputs – Six digital inputs (including coaxial, Toslink optical, BNC coaxial and AES/EBU), plus asynchronous USB and optional Bluetooth wireless ensure that the widest possible range of digital sources are supported, with input source quality of up to 24-bit/192kHz.

All-metal chassis – Combines structural rigidity, careful damping and control of acoustic resonance.ritical low level gain stages, these offer far improved stereo separation and imaging – unheard of at this price point.




  • ATF2 audio up-sampling to 24-bit/384kHz
  • Twin Analog Devices AD1955 24 bit DACs delivering superior sound-staging and stereo imaging
  • Balanced XLR and unbalanced RCA analogue audio outputs
  • Audiophile grade toroidal transformer delivering ultra-low low noise and distortion
  • Selectable digital filters – linear phase, minimum phase, steep
  • Full metal casework design with thick brushed aluminium front panel and dual layer damped feet, giving enhanced resonance control
  • Eco-friendly <0.5W standby power consumption
  • Azur Navigator remote control with Cambridge Audio 851 Series, Stream Magic
  • Headphone output with high-end, low distortion amplifier
  • Trigger out, control bus in/out for power syncing plus RS232 controllable
DAC Dual Analog Devices AD1955 24-bit DACs
Upsampling Analog Devices Black Fin ADSP-BF532 32-bit DSP performing 2nd
Generation ATF2 up-sampling to 24-bit 384kHz
Linear Phase, Minimum phase or Steep modes.
Digital Inputs S/PDIF, Toslink optical, BNC, AES/EBU, BT100 Bluetooth
USB Audio Input USB Type B conforming to Audio profile 1.0 or USB Audio profile
2.0 (user 1.0 or USB Audio profile 2.0 (user selectable)
Analogue audio outputs Balanced XLR and unbalanced RCA analogue audio outputs.
1 ¼" / 6.35mm headphone output (supports 600 ohm headphones, however 300 ohms max recommended)
Sample rates supported USB Audio1.0 16-24 bit, 32-96kHz
USB Audio 2.0 16-24 bit, 32-192kHz
Toslink 16-24 bit, 32-96kHz
S/PDIF 16-24 bit, 32-192kHz
BNC 16-24 bit, 32-192kHz
AES/EBU 16-24 bit, 32-192kHz
BT100 Bluetooth receiver: A2DP plus aptX
Maximum power consumption 40W
Dimensions (H x W x D) 115 x 430 x 360mm (4.5 x 16.9 x 14.7”)
Weight 7.5kg (16.5lbs)