Azur 551R

7.1 HDMI AV Receiver

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.

Azur 551R

Tech Specs
Power output

110W RMS per channel, into 6 Ohms (two channels driven), 90W RMS per channel, into 8 Ohms (two channels driven), 60W RMS per channel, into 8 Ohms (all 7 channels driven)


<0.006% @1kHz


<-60dB @ 1kHz

Frequency Response

10Hz - 20kHz -1dB

Signal to Noise Ratio

>90dB 'A' weighted

Audio input impedance/sensitivity

47k Ohms / 175mV or greater

Digital input impedance

75 Ohms (Coaxial/S/P DIF)

Tone Controls

Bass: +/-10dB @ 100Hz, Treble: +/-10dB @ 10kHz


FM mode: 87.5-108MHz, 75 Ohm coaxial aerial, AM mode: 522-1629kHz, 300 Ohm loop aerial

Video levels/impedance

- Composite (CVBS): 1Vp-p / 75 ohm - S-Video (S-VHS): Y 1Vp-p / 75 ohm C 0.286 Vp-p / 75 ohm Component: Y 1Vp-p / 75 ohm Cb/Cr 0.75Vp-p / 75 ohm Pb/Pr 0.75Vp-p / 75 ohm


HDMI 1.4 EIA/CEA - 861D HDCP 1.1 All audio modes supported except reception of native Direct Stream Digital (DSD). ARC and 3D-TV/deep colour pass through supported. CEC and HEC not supported.


Cirrus Logic CS43122 24 Bit 192kHz capable DAC for Front Left & Right Cirrus Logic CS52526 24 Bit 192kHz capable CODEC for surround channels + 24 Bit 2 channel A/D conversio Cirrus Logic CS497004 dual 32 bit DSP Faroudja FLI2310 scaler

Audio Inputs

6 x Line Level Analogue Tuner (FM/AM) 7.1 Analogue Input 4 x Digital Co-axial, 4 Digital Optical

Video Inputs

2 x Composite, 2 S-Video, 2 x Component Video, 4 HDMI

Audio Outputs

7 x Amplified Speaker, Outputs 7.1 x Preamp outputs

Video output

1 x HDMI

Recording Audio outputs

1 x Line Level Analogue, 1 x Digital Co-Axial, 1 Digital Optical

Other Connections

1 x 1/4" / 6.35mm Headphone Outpu (32 To 600 ohms recommended) 1 x IR Emitter In 1 x RS232C 1 IEC type mains inlet

Standby power consumption


Quiescent power consumption

< 70W

Max. Power Consumption


Dimensions (W x H x D)

430 x 110 x 340mm (16.9 x 4.3 x 13.3'')


10.0Kg (22lbs)



"We used the Azur 551R with a number of albums from different genres. And what we could not believe was the overall tonality of this AV receiver"

Sound Vision

United States,

"If you rarely want to do more than load a disc or tune a station and then sit back and enjoy, then the Cambridge very well might be your A/V receiver... My test bench results for Cambridge’s Azur 551R reflect outstanding performance on almost every test."


United Kingdom,

"Cambridge engineers put their efforts into the sound, which is, as I recall, the reason people used to get excited about hi-fis and home theaters."