Cambridge Audio AZUR 851N (Silver) Network Music Player/Streamer

Cambridge Audio AZUR 851N (Silver)

Network Music Player/Streamer

In stock
We are now offering an extended exchange period to give you confidence in your choice – and in us, as the right place to buy! *
Extended home exchange
£1,199
”A premium music streamer with the performance to match.”– ‘What Hi-Fi’ 2018 Product of the Year award winner.

Putting sound quality first

As Cambridge's range-topping network music payer you'd expect the Azur 851N to be pretty special under the lid, and that's exactly what it is! The highest quality sound comes from the use of audiophile quality components and tireless research and testing. As an 8-series design, the 851N uses a substantial toroidal power transformer at its centre. This enables clean, effortless power to be supplied to the other components, allowing them to give their best. High quality Analogue Devices AD1955 DACs (Digital to Analogue Convertors) are configured in dual-mono mode, ensuring maximum channel separation and precise sound-staging.

Fully equipped for High Resolution audio
At the heart of the 851N is a brand new Zander processor that facilitates 24-bit/192kHz file high resolution streaming from most methods - even Wi-Fi. On top of this, the 851N is compatible with a huge range of high resolution files, including ALAC, WAV, FLAC, AIFF, WMA, MP3, AAC, HE AAC, AAC+ and OGG Vorbis. The USB audio input also enables streaming of up to 24-bit/192kHz audio and even supports DSD streams from your computer. Originally designed for SACD players, DSD (Direct Stream Digital) encoded music files offer the same detailed, transparent sound as other high resolution file formats, giving you even greater choice of listening.

AFT2 Up-Sampling for the ultimate detail and least jitter
The Cambridge 851N improves sound quality still further with an Anagram Technologies AFT2 24 bit/384 kHz up-sampling circuit. ATF (Adaptive Time Filtering) up-sampling 'stretches' the music to give the highest resolution possible. Up-sampling sound gives a smoother, more relaxed sound quality with added detail. You'll also notice enhanced depth of sound and a more natural quality without the "edge" that can afflict digital music. You'll hear every detail, including every deep breath, squeaky chair and flutter of sheet music; in short, it's like being there for real! AFT2 even aids native 24-bit/192kHz recordings with a faster sampling rate for even less jitter.


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


Connect to Internet radio and Spotify Connect
In addition to supporting over 20,000, easy to access Internet radio stations, the Azur 851N is also compatible with the most popular music streaming services. Spotify is the world's most popular streaming service and the Azur 851N has Spotify Connect integrated into it (Spotify Premium account required). If you subscribe to Spotify Premium, you can control the Cambridge with the powerful Spotify Connect app on your phone or tablet. Should you prefer other music services, the 851N also supports Napster, BBC iPlayer for radio, Aupeo! Pandora and Rhapsody.

AirPlay and optional Bluetooth
In addition to comprehensive streaming capabilities over LAN, Wi-Fi and USB, the 851N is also compatible with Apple's AirPlay streaming. Use it with your iPhone, iPad PC or Mac and wireless stream your iTunes library or other compatible music services. Connect up the optional BT100 dongle and you'll be able to stream your music from any smartphone, tablet or other device with Bluetooth built-in.

Built-in digital pre-amp - just add active speakers!
If you're seeking quality hi-fi from a minimal system then the built-in digital pre-amp will appeal. Simply add active speakers via the digital or analogue outputs and you'll be able to control the volume and balance via the Azur 851N.

Fully connected, including XLR balanced sockets and 5 USBs
When it comes to connectivity the 851N lives up to its 8-series 'reference' billing. The highlight is the fitment of XLR balanced sockets. When used with a compatible amplifier, such as the matching Cambridge Audio 851A, these connections give the ultimate link possible, with greatly improved resistance to interference. There are also AES/EBU balanced digital input/output sockets for the ultimate digital connections. Added to this there are no fewer than five USB interfaces! The front-mounted socket is ideal for connecting temporary devices such as USB media sticks. At the back, three interfaces take care of more permanently connected media devices plus the optional Bluetooth dongle port. A Type B asynchronous USB input is provided for the direct connection of your PC or Mac. This makes the ideal connection for hooking up your computer as it will effectively 'control' the PC's output for the best sound quality possible. This greatly reduces jitter and gives the highest quality sound possible from your computer audio. Finally, both optical and coaxial digital sockets are provided for both inputs (x2) and outputs. This lets you connect up other digital components and take advantage of the quality DAC built into the 851N.

Intuitive app interface and colour display
With a free Apple/Android app you have effortless control over the radio stations with the comfort of your iPhone/iPod Touch/iPad or Android device. The app also seamlessly manages all your streaming content and is, in effect, a very user friendly way of bringing together and controlling all your digital sources. Boasting a new colour screen, it's now possible to display album art on the player. This makes it a pleasure to browse for albums and artists by whichever control system you use.

Full metal casing with extensive damping
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, meaning that 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. All these details combine to create a network player that not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

A first-rate performer in every respect, the flagship Cambridge Azur 851N network player is the audiophile's choice of streamer.

6 Year Supercare Guarantee
£119.85

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

Lowest price guaranteed!

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

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 / trade in discounts.
T&Cs apply

Buy now, pay later available
by phone, on items over £500

We offer 6 month interest free options. Call our Telesales team for details.

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. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. 19.9% APR representative. Find out more

 Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability.

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
T&Cs apply - see our delivery page.

* We now offer an extended exchange period on selected products, while our stores are temporarily closed. Audition in the comfort of your own home and enjoy the reassurance that you have made the right choice, or if you’re not completely satisfied, exchange in-store for a different product any time up to 14 days after our stores re-open. Click here for full Ts&Cs.


Richer Sounds exclusive model.

”A premium music streamer with the performance to match.”– ‘What Hi-Fi’ 2018 Product of the Year award winner.

Putting sound quality first

As Cambridge's range-topping network music payer you'd expect the Azur 851N to be pretty special under the lid, and that's exactly what it is! The highest quality sound comes from the use of audiophile quality components and tireless research and testing. As an 8-series design, the 851N uses a substantial toroidal power transformer at its centre. This enables clean, effortless power to be supplied to the other components, allowing them to give their best. High quality Analogue Devices AD1955 DACs (Digital to Analogue Convertors) are configured in dual-mono mode, ensuring maximum channel separation and precise sound-staging.

Fully equipped for High Resolution audio
At the heart of the 851N is a brand new Zander processor that facilitates 24-bit/192kHz file high resolution streaming from most methods - even Wi-Fi. On top of this, the 851N is compatible with a huge range of high resolution files, including ALAC, WAV, FLAC, AIFF, WMA, MP3, AAC, HE AAC, AAC+ and OGG Vorbis. The USB audio input also enables streaming of up to 24-bit/192kHz audio and even supports DSD streams from your computer. Originally designed for SACD players, DSD (Direct Stream Digital) encoded music files offer the same detailed, transparent sound as other high resolution file formats, giving you even greater choice of listening.

AFT2 Up-Sampling for the ultimate detail and least jitter
The Cambridge 851N improves sound quality still further with an Anagram Technologies AFT2 24 bit/384 kHz up-sampling circuit. ATF (Adaptive Time Filtering) up-sampling 'stretches' the music to give the highest resolution possible. Up-sampling sound gives a smoother, more relaxed sound quality with added detail. You'll also notice enhanced depth of sound and a more natural quality without the "edge" that can afflict digital music. You'll hear every detail, including every deep breath, squeaky chair and flutter of sheet music; in short, it's like being there for real! AFT2 even aids native 24-bit/192kHz recordings with a faster sampling rate for even less jitter.


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


Connect to Internet radio and Spotify Connect
In addition to supporting over 20,000, easy to access Internet radio stations, the Azur 851N is also compatible with the most popular music streaming services. Spotify is the world's most popular streaming service and the Azur 851N has Spotify Connect integrated into it (Spotify Premium account required). If you subscribe to Spotify Premium, you can control the Cambridge with the powerful Spotify Connect app on your phone or tablet. Should you prefer other music services, the 851N also supports Napster, BBC iPlayer for radio, Aupeo! Pandora and Rhapsody.

AirPlay and optional Bluetooth
In addition to comprehensive streaming capabilities over LAN, Wi-Fi and USB, the 851N is also compatible with Apple's AirPlay streaming. Use it with your iPhone, iPad PC or Mac and wireless stream your iTunes library or other compatible music services. Connect up the optional BT100 dongle and you'll be able to stream your music from any smartphone, tablet or other device with Bluetooth built-in.

Built-in digital pre-amp - just add active speakers!
If you're seeking quality hi-fi from a minimal system then the built-in digital pre-amp will appeal. Simply add active speakers via the digital or analogue outputs and you'll be able to control the volume and balance via the Azur 851N.

Fully connected, including XLR balanced sockets and 5 USBs
When it comes to connectivity the 851N lives up to its 8-series 'reference' billing. The highlight is the fitment of XLR balanced sockets. When used with a compatible amplifier, such as the matching Cambridge Audio 851A, these connections give the ultimate link possible, with greatly improved resistance to interference. There are also AES/EBU balanced digital input/output sockets for the ultimate digital connections. Added to this there are no fewer than five USB interfaces! The front-mounted socket is ideal for connecting temporary devices such as USB media sticks. At the back, three interfaces take care of more permanently connected media devices plus the optional Bluetooth dongle port. A Type B asynchronous USB input is provided for the direct connection of your PC or Mac. This makes the ideal connection for hooking up your computer as it will effectively 'control' the PC's output for the best sound quality possible. This greatly reduces jitter and gives the highest quality sound possible from your computer audio. Finally, both optical and coaxial digital sockets are provided for both inputs (x2) and outputs. This lets you connect up other digital components and take advantage of the quality DAC built into the 851N.

Intuitive app interface and colour display
With a free Apple/Android app you have effortless control over the radio stations with the comfort of your iPhone/iPod Touch/iPad or Android device. The app also seamlessly manages all your streaming content and is, in effect, a very user friendly way of bringing together and controlling all your digital sources. Boasting a new colour screen, it's now possible to display album art on the player. This makes it a pleasure to browse for albums and artists by whichever control system you use.

Full metal casing with extensive damping
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, meaning that 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. All these details combine to create a network player that not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

A first-rate performer in every respect, the flagship Cambridge Azur 851N network player is the audiophile's choice of streamer.
Brand Cambridge Audio
Colour Silver
Apple AirPlay Yes
DLNA Compliant No
High Resolution Audio Yes
Power Consumption - Standby 1
App Control Yes
USB 4
Weight (KG) 8
Wireless Connection Yes
XLR Balanced Outputs Yes
Audio Inputs 6 (AES/EBU, coaxial x 2, optical x 2, USB)
Audio Outputs 4 (coaxial, optical, balanced XLR, unbalanced RCA)
Bluetooth Optional
Dimensions WxDxH (mm) 430 x 360 x 115
HDMI No
Headphone Output No
Pre Output Digital pre amp
Remote Control yes
Smart Remote Control No
Smartphone control Yes
Tone Controls No
Tuner Radio Internet
XLR Inputs AES/EBU Balanced
Wi-Fi Built In yes
Text Display yes
USB Input 1
Rated 1 out of 5 by from Great at first Had my untit just over 3 years now paired with the 851a, initially I would of said 5star amazing sound but over the past 12 months the right hand channel would produce no sound on start up. After several minutes you would get a hiss and sound would eventually come through. Now I get no sound at all through the right channel... Not what you expect for over a grand after 3 years, I have a techics hifi over 20 years old that still works perfectly... Would I recommend this product, hard to say!
Date published: 2020-04-14
Rated 1 out of 5 by from Internal dac dead after only 3 years of use! When i first purchased the 851n i gave it a 5 star review for excellent sound quality and build. My unit did fail to output sound on occasions from one channel and sometimes both channels when I first got it. Reading on the Cambridge website said this was a problem they were aware of and came down to the dac crashing on startup. Powering up again usually solved the problem. Unfortunately now after only three years of use the unit no longer outputs any sound no matter how many times I power the unit on and off the dac is dead! Will not buy Cambridge products again!
Date published: 2020-02-07
Rated 5 out of 5 by from Superb I bought the 851N as a upgrade for my cxn series 1 it has superb sound great dynamics great separation of complex passages of music the upgrade is worth every penny
Date published: 2019-12-12
Rated 1 out of 5 by from No google chromecast - unforgiveable Just bought this after having a CXN V2. Set it up and despite being approx twice the price it doesn't have google Chromecast like the CXN V2. I am therefore unable to stream from my Tidal app. You can use the Cambridge Audio app but it is dire with no ability to add tracks, albums or artists to your favourites list so you have to come out of it and go into theTidal app to add the songs you want.In addition it doesn't tell you if albums are remastered or if they are High Res audio like the Tidal App. Using two apps is fiddly and a pain to do. You shouldn't need to use 2 apps to do this and at £1400 this is an enormous oversight on the part of Cambridge Audio. The Cambridge app is unusable imo so i will be returning the streamer. The streamer sounds good but the app support and omission of google chromecast is unforgiveable.and sadly makes the user experience is so poor from the app I cant use this product. One very unhappy customer
Date published: 2019-09-07
Rated 5 out of 5 by from Top class Love my 851N every minutes. I partner with my Arcam AVR550 and Dali Opticon 6 and use chord shawline power cable and RCA to improve sound , fantastic sound so details and crisp.app easy to use same no airplay or chromecast for Tidal But to be honest Tidal work well into the app.
Date published: 2019-08-31
Rated 5 out of 5 by from Fantastic product - easy setup, superb onboard DAC I bought this last month, and it is a brilliant performer. It performs well with Hi- Res files from my USB stick, ripped CD music on a Hard Disk Player and amazingly well with internet radio. It can connect to an existing amp or direct into a power amp (as it has its own preamp and DAC.) Very please with it!
Date published: 2019-06-03
Rated 5 out of 5 by from Great Sound Certainly a step up from the CXN and worth the extra cost. Provided the rest of your system is good enough.
Date published: 2019-05-05
Rated 5 out of 5 by from Stunning sounds I have had this a month or so, it conintues to impress as do the other CA items bought to go with it (qualified, guided and selected with the great crew in Richer's Reading store, who "proved it" all the way). Lots of inputs (believe it or not another couple of digitals would be better) and it suipplies the 851A as the "head" it upscales into the amp. It really is blisteringly good partnered with the 851a! The IR control manages the amp in tandum so very good. If Cambridge are reading this - please make the screen bigger, and the instructions really shouldn't be a download off the web. It would be better if the "inputs" had buttons (as on the 51a), there is no 3.5mm jack (not a big problem, but why not).
Date published: 2019-03-15
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£1,199
Cambridge Audio AZUR 851N (Silver) is rated 4.3 out of 5 by 16.
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Please call your local store Members of our team are happily working from home to provide advice, info on stock and other help. They can also process sales and arrange delivery direct from our warehouse. Buy by phone Call our national Telesales team on
0333 900 0093

6 Year Supercare Guarantee
£119.85

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

6 YEAR SUPERCARE GUARANTEE 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.

Lowest price guaranteed!

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

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 / trade in discounts.
T&Cs apply

Buy now, pay later available
by phone, on items over £500

We offer 6 month interest free options. Call our Telesales team for details.

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. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. 19.9% APR representative. Find out more

 Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability.

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
T&Cs apply - see our delivery page.