Cambridge Audio AZUR 851N (Black) is rated 3.8 out of 5 by 4.
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Cambridge Audio AZUR 851N (Black)

Network Music Player/Streamer

In-store Clearance item

Open Box Guide Price (2 available across all stores) £1014 .950000
Last brand new price £1199 .000000
On Display Guide Price (7 available across all stores) £1199 .000000

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”A premium music streamer with the performance to match.” ’What Hi-Fi?’ – 5 Star review.

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.
Smart Features
Apple AirPlay
Smartphone control
Audio Inputs
6 (AES/EBU, coaxial x 2, optical x 2, USB)
Audio Outputs
4 (coaxial, optical, balanced XLR, unbalanced RCA)
Optional - BT100
Pre Output
Digital pre amp
USB Input
Wi-Fi Built In
XLR Balanced Outputs
XLR Inputs
AES/EBU Balanced
High Resolution Audio
Text Display
Tuner Radio
Energy Consumption
Power Consumption - Standby
Dimensions WxHxD (mm)
430 x 115 x 360
Weight (KG)
Remote Control
Rated 4 out of 5 by from Great machine good value for money I purchased one of the first 851N, s. It, s a great machine. But what is just as important is the support and software upgrades which are still going on to this day. A lot of manufacturers change models every one ore two years and have a limited time of softwaresupport is my experience. I think cambridge goes
Date published: 2021-01-10
Rated 5 out of 5 by from Great network player I got the 815N for about a week now and is already the main - centrepiece of my hi-fi system. Alongside 815W power amplifier that I've purchased a few months ago, the 815N is an outstanding network player and also a great pre-amp. There's no need to say that you can play almost every music format that you can think of. Streaming services like Spotify, Tidal and Qobuz are preloaded into the system inputs. There are plenty of digital connection to chose from to connect your TV, CD player and other devices. The functionality of the player is straightforward and intuitive. Good quality remote control with lighten buttons for ease of use in dark rooms. Altogether I am very, very pleased with this machine that is reproducing an amazing sound at low and high volume as well and is very easy to use. I highly recommend it to anyone who loves high quality sound music.Thanks.
Date published: 2020-12-23
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 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 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
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  • Representative 21.9% APR (variable)
  • Purchase rate 21.9% p.a. (variable)
  • Assumed credit limit £1,200
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For purchases over £500, you can settle the balance in 6 months, and in 10 months on purchases over £1000 and pay no interest whatsoever. If you settle part of your loan in the deferral period you won’t pay interest on that part. You can still pay off the loan sooner if you make additional payments. If you’d rather spread the cost over 36 months, you can set up a loan repayment plan when the payment-free period comes to an end at 19.9% APR representative. A one-off settlement fee of £29 will be applied. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. Richer Sounds Limited acts as a credit broker and not the lender. Barclays Partner Finance acts as the lender. Find out more information and eligibility criteria here.