Cambridge Audio AZUR 851D (Black)

Digital Pre-Amplifier/DAC

In stock
£999
More than just a DAC, the Cambridge Audio 851D is a digital pre-amplifier that's at the heart of your digital system.

Complete digital pre-amp

Marking the Cambridge Audio 851D out from its DAC rivals is the unmatched flexibility. Take a deep breath and take in the following: six digital inputs including a professional standard AES/EBU, rare BNC, twin optical, plus two more inputs offering the option of coaxial or optical. There is also an asynchronous USB link that supports high-resolution audio files up to 192kHz, making the 851D ideal for high resolution music playback from your computer.

It's also a DAC
In terms of connecting the DAC to your amp, take your pick from optical or coaxial digital and RCA or XLR analogue. Throw in a control bus link, RS232 socket and trigger out for multi-room system control and it's hard to see how the 851D could be any better equipped. With the supplied remote control offering a switchable volume control there may be no need to add a pre-amp at all*. Just add a power amp or active speakers and you're all set to go.

Bluetooth connectivity
Supplied with the Cambridge Audio BT100 Bluetooth dongle, the 851D will accommodate Bluetooth music transfers from your smartphone, tablet, laptop or other compatible devices. Although not quite the quality of other streaming sources, it's handy to have when playing background music. Thanks to A2DP plus aptX support, the quality is as good as is possible using Bluetooth.

Superior components
At the heart of the 851D are two Analogue Devices AD1955 24-bit DACs in dual differential formation. Each DAC handles just one channel for excellent stereo imaging, operating fully in differential mode for exceptionally low distortion and noise. What you hear is an exceptionally unforced, natural sound quality with instruments and vocals 'breathing' with emotion and depth.

ATF2 audio upsampling
The high quality DACs are complemented by a new Anagram Technologies ATF2 24 bit/384 kHz up-sampling circuit. Up-sampling lower resolution sources 'stretches' them to give the highest resolution possible. It also aids standard 24-bit/192kHz recordings with a faster sampling rate for less jitter. You'll hear a smoother, more relaxed sound with added detail and enhanced depth, without the 'edge' that can afflict digital music


What is ATF Upsampling Technology? Click here to learn more.


Tailored sound
As we all prefer slightly different nuances of sound quality, the 851D comes with Cambridge Audio's triple filter system. Select from Linear Phase, Minimal Phase or Steep modes and you can subtly alter the sound quality. You might even find certain types of music sound better with a particular filter engaged.

Full metal casing
Using a full metal casing with rounded edges, doesn't just look and feel good, it helps the sound, too. The case is rigid and well-damped, so it won't resonate unhelpfully. The thick aluminium front panel looks the part and also acts as a shield against electrical interference from sources such as dimmers and RF devices. Together the 851D not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

Unequivocally the best DAC we've ever sold, with a level of connectivity that also puts it in a class of its own, the Cambridge Audio 851D is the ultimate heart of your digital system.

*Conventional pre-amplifier required if connecting analogue sources to your system; such as turntable, tuner or cassette deck plus CD players without digital output.

We'll happily come to you!

Our experienced advisors are able to visit you at your home or place of work today, to help select the right equipment at the best prices.

6 Year Supercare £99.90

Add our Supercare to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Free UK delivery

Next day delivery and timed options available for online purchases of selected products. Please see checkout for further details.

Buy now, pay later For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Find out more

We offer 6 month interest free options. Call or ask in-store for details

Lowest price guaranteed! We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 7 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trace in discounts.
T&Cs apply

We’ll beat any genuine advertised price, even from the web & give you up to £100!

More than just a DAC, the Cambridge Audio 851D is a digital pre-amplifier that's at the heart of your digital system.

Complete digital pre-amp

Marking the Cambridge Audio 851D out from its DAC rivals is the unmatched flexibility. Take a deep breath and take in the following: six digital inputs including a professional standard AES/EBU, rare BNC, twin optical, plus two more inputs offering the option of coaxial or optical. There is also an asynchronous USB link that supports high-resolution audio files up to 192kHz, making the 851D ideal for high resolution music playback from your computer.

It's also a DAC
In terms of connecting the DAC to your amp, take your pick from optical or coaxial digital and RCA or XLR analogue. Throw in a control bus link, RS232 socket and trigger out for multi-room system control and it's hard to see how the 851D could be any better equipped. With the supplied remote control offering a switchable volume control there may be no need to add a pre-amp at all*. Just add a power amp or active speakers and you're all set to go.

Bluetooth connectivity
Supplied with the Cambridge Audio BT100 Bluetooth dongle, the 851D will accommodate Bluetooth music transfers from your smartphone, tablet, laptop or other compatible devices. Although not quite the quality of other streaming sources, it's handy to have when playing background music. Thanks to A2DP plus aptX support, the quality is as good as is possible using Bluetooth.

Superior components
At the heart of the 851D are two Analogue Devices AD1955 24-bit DACs in dual differential formation. Each DAC handles just one channel for excellent stereo imaging, operating fully in differential mode for exceptionally low distortion and noise. What you hear is an exceptionally unforced, natural sound quality with instruments and vocals 'breathing' with emotion and depth.

ATF2 audio upsampling
The high quality DACs are complemented by a new Anagram Technologies ATF2 24 bit/384 kHz up-sampling circuit. Up-sampling lower resolution sources 'stretches' them to give the highest resolution possible. It also aids standard 24-bit/192kHz recordings with a faster sampling rate for less jitter. You'll hear a smoother, more relaxed sound with added detail and enhanced depth, without the 'edge' that can afflict digital music


What is ATF Upsampling Technology? Click here to learn more.


Tailored sound
As we all prefer slightly different nuances of sound quality, the 851D comes with Cambridge Audio's triple filter system. Select from Linear Phase, Minimal Phase or Steep modes and you can subtly alter the sound quality. You might even find certain types of music sound better with a particular filter engaged.

Full metal casing
Using a full metal casing with rounded edges, doesn't just look and feel good, it helps the sound, too. The case is rigid and well-damped, so it won't resonate unhelpfully. The thick aluminium front panel looks the part and also acts as a shield against electrical interference from sources such as dimmers and RF devices. Together the 851D not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

Unequivocally the best DAC we've ever sold, with a level of connectivity that also puts it in a class of its own, the Cambridge Audio 851D is the ultimate heart of your digital system.

*Conventional pre-amplifier required if connecting analogue sources to your system; such as turntable, tuner or cassette deck plus CD players without digital output.
More Information
Analogue Input 8
Bluetooth Optional
Coaxial Digital Input 2 + 1 BNC
Dimensions WxDxH 430 X 360 X 115
Headphone Output Yes
Loudness Control Yes
MP3 Front Input No
Optical Digital Input 4
Optical Digital Inputs 2
Tone Controls No
USB Input Yes
Weight (KG) 7.5 kg
XLR Balanced Outputs Yes
Brand Cambridge Audio
Colour Black
Coaxial Digital Output Yes
Rated 5 out of 5 by from Excellent DAC/pre-amp. I ordered on-line and the unit arrived at the time agreed. The packaging was probably the best I have seen for a hi-fi product. The unit is very well made and oozes quality. Easy to set up and, apart from the batteries supplied for the remote being dead, very easy to use immediately. The sound is detailed with a sweet treble, engaging mid-range and deep tuneful bass. It is a bargain at the price.
Date published: 2017-05-11
Rated 5 out of 5 by from Amazing DAC This is a truly high end piece of equipment which oozes quality. The build quality is amazing with a solid feel and full metal casework, and the sound is extremely clean and detailed. This DAC is only worth purchasing if the rest of your other kit is up to the same quality, otherwise it's true qualities will go unnoticed. Excellent top of the line product, and I'm very pleased with it.
Date published: 2017-04-09
Rated 5 out of 5 by from Excellent comprehensive DAC The 851D arrived exactly when stated and after I took it out of the box, I placed it on my Hi Fi rack and left it for two days to allow it to acclimatize to the warmer air in the house. The unit had felt quite cold when I removed it from the box straight after delivery, and I didn't want to power it up with the risk of any condensation on the circuit boards. I hooked it up to several digital sources including a Sansui DAB/FM/Internet tuner (optical connection) and a Pioneer multi-format disc player (co-ax connection). The manual was easy to follow and I decided to 'dis' the variable pre-amp volume control part of the unit, and keep the analog output 'fixed' and fed the XLR balanced output into my 851E pre-amp. It all worked first time. Very often things don't work first time with some kit due to misreading or misinterpreting the manual, but with the 851D, it was a doddle. The sound quality of the 851D feeding the 851E and then into the 651W power amp is beyond reproach.
Date published: 2016-10-21
Rated 5 out of 5 by from Amazing I would have never thought that a DAC could make such a difference The 851D is splendid unit beautifully engineered and it sounds so so good I would recommend that you have a listen to this unit before you buy a cheaper one
Date published: 2015-05-13
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£999
Cambridge Audio Digital Pre-Amplifier/DAC is rated 5.0 out of 5 by 4.
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We'll happily come to you!

Our experienced advisors are able to visit you at your home or place of work today, to help select the right equipment at the best prices.

6 Year Supercare £99.90

6 YEAR SUPERCARE COSTS JUST £9.99 ON ALL ITEMS UNDER £100, OR 10% OF PURCHASE PRICE ON ANYTHING OVER £100.

We think you’ll agree that our Supercare guarantee offers fantastic value. What’s more, if you don’t use our it in the 6 year period, we’ll refund the cost of it. You really can’t say fairer than that!
Plus, if we can’t fix a fault, we will give you a like-for-like replacement.
Find out full details here.

Add our Supercare to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Free UK delivery

Next day delivery and timed options available for online purchases of selected products. Please see checkout for further details.

Buy now, pay later For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Find out more

We offer 6 month interest free options. Call or ask in-store for details

Lowest price guaranteed! We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 7 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trace in discounts.
T&Cs apply

We’ll beat any genuine advertised price, even from the web & give you up to £100!

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