CAMBRIDGE AUDIO 851D Digital Pre Amp/DAC Black
CAMBRIDGE AUDIO 851D Digital Pre Amp/DAC Black CAMBRIDGE AUDIO 851D Digital Pre Amp/DAC Black
CAMBRIDGE AUDIO 851D Digital Pre Amp/DAC Black

Regular Price: $2,199.00

Special Price $1,895.00

Warranty Period: 2 years Sold as: 1


Azur 851D Digital-to-Analogue Converter

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)

Product Faqs

  • What can I plug into my DAC?

    DAC's will usually have a number of inputs. Coaxial and Toslink Optical are the most common, while USB is still also very common.

    The Optical and Coaxial connections can have a CD player, network streamer, television, dvd/blu-ray disc player, game console, and some computers.

    The USB input can handle pretty much any kind of computer, or a phone with the appropriate adapter (OTG for android, Camera Connect Kit for iOS devices).

  • What is a DAC?

    Every digital device with an analog output has a Digital to Analog Converter of some kind. In the case of phones, televisions, and computers, they are usually stuck on as an afterthought, or just to do the job of creating analog sound to be amplified and played through speakers.

    Having a standalone DAC is a worthwhile investment in any modern Hi-Fi system, essentially all the circuitry involved in creating that signal you can hear from the 1's and 0's is housed in its own box, with usually a much better design than what you would find in your television or computer.

    A DAC can be useful to connect digital devices to an analog amplifier if the amplifier doesn't have digital inputs. Or if you are after a cleaner, more refined sound.

    Things to listen for in higher quality DAC's are separation of sounds (how well you can hear a single voice or instrument in the mix of all the others), "textures" of sounds (raspyness of a bow being drawn across the strings of a double bass), or the clarity of echo's and quiet noises among loud instruments.

You may also be interested in