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Cambridge Audio Azur 551R 7.1 HDMI AV Receiver

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Product Description

Azur 551R 7.1 HDMI AV Receiver

An AV Receiver that sounds like a hifi!


As TVs become impossibly thin – and sound quality gets even leaner – there’s never been a better time for a home theatre system that sounds sensational but is also simple to use. 

Music is at the heart of Cambridge Audio and this all new AV Receiver is designed to deliver sound that’s in every way as epic as the picture quality from your movies, music and TV shows. 

So, as well as all the latest processing features you’d expect, the 551R's ability to reproduce music with incredible richness and authority really separates it from the herd. 

A staggering 110 Watts of power is achieved by combining Cambridge Audio’s audio design expertise and the choicest selection of audiophile components. 

From an all-metal and surprisingly compact design, the 551R features a multitude of connections and is guaranteed to revolutionise the audio potential of Blu-ray players, video streamers, satellite boxes, iPod docks, games consoles and of course hi-fi source components. 

Like our entire range, the 551R was created at Cambridge Audio’s Research and Development Centre on London’s Southbank by a team with an uncontested passion for making music sound sensational!


In more detail...

Our all-new 551R offers everything you could need in a home cinema receiver from a surprisingly compact chassis.

Delivering truly great sound as well as all the latest processing features is the ultimate test of any home cinema receiver and its ability to reproduce music with such richness and authority is what really separates the 551R from the competition. With seven 110 watts capable channels (measured at 6 ohms) the 551R delivers movie soundtracks, TV and music with power, punch and superb dynamics. 

Audiophile specification...
Seven discrete amplifiers driven by a low-flux toroidal transformer are separated from the processing and input stages guaranteeing performance without compromise. And because typical set-ups now include a multitude of sources with digital audio connections, special attention has been given to the 551R’s digital to analogue conversion process thus giving it the ability to maximise the audio potential of every connected digital device such as Blu-ray players, satellite boxes, iPod docks, games consoles and more.

Processing tour de force 
And whilst musical performance is at the heart of the 551R, it also offers all the latest processing technologies to excite the most avid home cinema enthusiast including the most current Cirrus Logic DSPs and support for the latest CODECs such as Dolby TrueHD and DTS HD Master Audio. Meanwhile, a Faroudja 1080p video scaler vastly improves performance from lower resolution TV broadcasts and DVDs as well as transcoding analogue video inputs to the digital domain for simpler and neater connection to the TV using just one HDMI cable. 

In terms of connectivity, the 551R boasts four HMDI inputs and a single HDMI output which fully supports 3DTV/Deep colour pass-through and Audio Return from newer digital TVs. It also features a wide selection of analogue video connections (ready for transcoding), four digital audio connections and a total of six analogue audio inputs. 

Furthermore, the 551R includes a host of processing and adjustment features to get the most from every multi-channel movie soundtrack. These include full individual crossover adjustment and bass management, lip sync adjustment, Dolby Dynamic range control and DTS-HD speaker re-map (these features are explained in greater detail below). 

Ease of set-up
AVRs typically have a habit of causing much head scratching but the 551R has been designed to ensure simple set-up and ease of use for all the family. Cambridge Audio’s Microphone Controlled Auto Set-up (CAMCAS) tailors the 551R’s performance to any room and comes complete with a microphone to complete this simple procedure. Day to day operation is equally straightforward from either the clear front panel controls or the supplied remote. 

Clever cooling = compact design
But perhaps the most surprising feature of the 551R is its diminutive size - made possible thanks to a unique cooling design system called X-Tract™. A perfectly balanced combination of forced cooling and natural convection effectively draws heat away from the substantial transformer and output stages and means the 551R can operate extremely quietly, at a low temperature and enables a more compact enclosure than would normally be possible for such a powerhouse.


Many mistakenly believe that you have to choose between the delights of quality sound high-fidelity music and the fun of home theater. With Cambridge Audio's Azur 551R you get both in one captivating package. The 551R serves up the latest audio and video features your high-def home theater needs, along with the warm involving sound that Cambridge Audio is known for. This precision-built receiver includes potent, audiophile-quality amplification for seven speakers plus decoding for the superior high-resolution surround sound formats available with today's HD video sources. The beefy 551R is not just built, but overbuilt. Don't be fooled by its 60 watts-per-channel rating, which is measured all channels going full-tilt simultaneously. Under strenuous conditions, the 551R comes through with spectacular, low-distortion sound that few can attain.In stereo mode, you get a clean, solid 90 watts per channel.

Cambridge Audio Azur 551R

Connections for your favorite sources

HDMI inputs let you hook up your four best high-def components for easy switching. Analog-to-HDMI conversion with Faroudja processing sends all of your video sources to an HDMI-capable TV via a single-cable digital connection. Cirrus Logic dual 32-bit DSPs ensure that every audio nuance gets it due. These processors are designed to meet the mammoth digital calculating demands of today's big music and soundtrack files. So whether it's from your favorite film or philharmonic orchestra you'll become immersed in the warm involving sound.

Acrobatic flexibility

The Azur 551R opens many possibilities for the enjoyment of quality sound. The back surround channels are re-assignable for use with bi-amp capable speakers. By doubling the power to this speaker type, you'll get every ounce of performance you paid for. And, if you have a Blu-ray player with multi-channel output, the 551R will give it a warm analog welcome with 7.1-channel preamp input. Or if you have separate amplifiers, you can work the other side of the street and feed them 7.1 channels of analog audio.

Built like a British frigate

Cambridge Audio's London-based engineering team designed the Azur 551R according to their usual high-end standards. This receiver boasts seven discrete amplifiers, powered by a low-flux toroidal transformer. This combination provides steady power throughout the fluctuating demands of the music itself, and delivers sound via separate amplifiers for every channel. These are isolated from the processing and input stages to minimize interference and ensure performance without compromise. The rock-solid, low-vibration chassis contains Cambridge's clever X-tract™ cooling systems to minimize distortion and loss of efficiency caused by overheating. A perfectly balanced combination of natural convection and forced cooling draws away heat virtually silently.


Azur 551R 7.1 HDMI AV Receiver Features

4 HDMI in, 1 out with support for 3D TV / Deep colour pass thru / Audio Return Channel reception
Faroudja FLI2310 video scaler for upscaling and analog to digital video transcoding/scaling (composite, S-video and component video to HDMI)
Scaler bypass mode – allows user to engage/disengage video scaler for each input as appropriate
Oversize low flux toroidal transformer and discrete amplifiers delivering ultra-low noise and distortion
Cirrus Logic dual 32-bit DSPs for compatibility with the latest CODECs including Dolby Digital Plus, DTS- HD High Resolution and the Lossless Dolby True HD and DTS-HD Master Audio formats
Pure Analogue Stereo Direct mode for audiophile playback of analogue stereo sources
Individual Crossovers and Advanced Bass Management
Cambridge Audio Mic Controlled Auto Set-up (CAMCAS) with microphone supplied
Full 5.1/7.1 multi-channel analogue inputs and preamp outputs
Adjustable lipsync delay per source
DTS Speaker re-mapping allows the playback of DTS-HD High Resolution or Master Audio formats with encoded height information on standard 5.1, 6.1 or 7.1 speaker setups
Bi-amp mode for front left/right with surround back left/right in 5.1 set-up
X-Tract™ Forced/Convection Heat Tunnel for virtually silent performance
FM/AM tuner with RDS
RS232 control, IR Emitter Input
Low resonance, acoustically damped full metal chassis
Navigator style Azur remote control
Also controllable from 651BD/751BD remote
Slim, aesthetic design – only 110mm (4.3’’) tall!





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