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Cambridge Audio Azur 751R

7.2-channel home theater receiver with asynchronous USB input

6 Reviews | 2 questions - 2 answers

Item # 779751RB

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Our take on the Cambridge Audio Azur 751R

If you appreciate great sound, Cambridge Audio's Azur 751R top-of-the-line A/V receiver has you covered — whether you're into high-resolution digital music, high-performance home theater, or both. For starters, you get potent, audiophile-quality amplification for seven speakers, plus decoding for the high-resolution surround sound formats available with today's HD video sources. Cambridge measures the 751R's 120 watts-per-channel rating with all channels going full-tilt simultaneously. Under strenuous conditions, the 751R comes through with spectacular, low-distortion sound that few can attain. In stereo mode, you get a beefy 170 watts per channel.

A powerhouse receiver for music and movie lovers

If you appreciate great sound, Cambridge Audio's Azur 751R top-of-the-line A/V receiver has you covered — whether you're into high-resolution digital music, high-performance home theater, or both. For starters, you get potent, audiophile-quality amplification for seven speakers, plus decoding for the high-resolution surround sound formats available with today's HD video sources. Cambridge measures the 751R's 120 watts-per-channel rating with all channels going full-tilt simultaneously. Under strenuous conditions, the 751R comes through with spectacular, low-distortion sound that few can attain. In stereo mode, you get a beefy 170 watts per channel.

Digital upsampling ramps details up — stamps jitter out

The Azur 751R uses proprietary Adapted Time Filter (ATF) audio upsampling for improved sound quality from every digital source in your system. This sophisticated technology upsamples all incoming digital audio to a 192kHz/24-bit signal in order to resolve extremely fine detail, even from compressed music sources. At the same time, ATF incorporates a 32-bit digital signal processor that re-clocks the digital data to eliminate jitter — the enemy of digital audio that causes harshness and loss of detail.

Asynchronous USB input means better sound from your computer

High-res audio

The Azur 751R is one of the only home theater receivers we've ever seen to inlcude an asynchronous USB input for making a digital connection from your computer. Why is that helpful? Because even though today's digital music files can compete with (and even beat) CD sound quality, standard USB outputs from most computers pose a serious limitation to audio fidelity. When you're trying to listen to music, your PC is busy running background tasks that can introduce jitter, adversely affecting sound quality.

The Azur 751R eliminates these problems before they begin. It reaches out to your computer and takes control of the data stream timing. In its place, it inserts its own separate, or asynchronous, clock to precisely control the timing of the data rate, reducing jitter to the vanishing point. The result is improved detail along with a wider, deeper soundstage. The Azur 751R even supports files up to 192kHz/24-bit resolution over this USB connection.

Connections for your favorite sources

HDMI inputs let you hook up your six best high-def components for easy switching. Analog-to-HDMI upconversion with Anchor Bay® processing makes all your video sources look their best, and with two HDMI outputs you can send them to both a flat-panel TV and a projector.

A multitude of setup choices

The Azur 751R opens many possibilities for the enjoyment of quality sound. The back surround channels are re-assignable for use with bi-amp capable front speakers. By doubling the power to a pair of biampable speakers, you'll get every ounce of performance you paid for. If you would like to listen to music in another room, you can use the two back surround channels for music while enjoying 5.1-channel surround sound in your theater room. If you've got an infrared repeater system, use the supplied second-room remote to control the receiver. If you have a Blu-ray player with multi-channel output, the 751R 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.

No-nonsense British design

Cambridge Audio's London-based engineering team designed the Azur 751R according to their usual high-end standards. This receiver boasts seven discrete amplifiers, powered by a low-flux toroidal transformer that supplies steady current, even during demanding peaks in the audio signal. The amplifiers 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 system 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.

Product Highlights:

    Power and processing:
    • 7-channel amplifier
    • 170 watts per channel into 8 ohms (1k Hz) at 0.006% THD, with 2 channels driven
    • 120 watts per channel into 8 ohms (1k Hz) at 0.006% THD, with 7 channels driven
    • Dolby® TrueHD, DTS-HD™ Master Audio, Dolby Pro Logic® IIx, and DTS Neo:6 decoding
    • 192kHz/24-bit audio Adapted Time Filter (ATF) upsampling technology delivers better sound with all your digital sources
    • analog-to-HDMI video upconversion (up to 1080p) via Anchor Bay ABT2010 video scaler
    • Audyssey Laboratories' 2EQ for easy speaker setup (microphone included)
    • Audyssey Dynamic Volume mode to keep listening levels steady
    Multi-room Audio:
    • dual-room/dual-source output
      • powered audio output for 2nd room (using powered 2nd-room output allows 5.1 home theater in main room)
      • 2.1-channel line-level output for 2nd room (requires amplification for each channel)
    Audio Performance Features:
    • high-current amplifier design
    • Pure Analogue Stereo Direct mode switches off all unused circuitry for the cleanest possible sound
    • dual Cirrus Logic dual 32-bit DSPs for outstanding sound quality for your hi-res music files
    • back surround speaker channels re-assignable for bi-amping compatible front left and right speakers
    • 192kHz/24-bit digital-to-analog converters for all channels
    • 1080p-compatible HDMI digital video switching (6 in, 2 out)
    • HDMI version 1.4a with support for 3D video, Audio Return Channel, Deep Color, x.v.Color, SACD, and auto lip-sync
    • asynchronous USB audio input supports high-resolution music files from your computer (up to 24-bit/192kHz resolution)
    • digital audio inputs: 5 optical, 5 coaxial
    • digital audio outputs: 2 optical, 2 coaxial
    • 5 audio/video inputs, including:
      • 1 front-panel input with composite video
      • rear-panel inputs including 5 composite video, 5 S-video, and 3 component video
    • preamp outputs for 2 powered subwoofers
    • 7.1-channel analog audio preamp input
    • 7.1-channel analog audio preamp output for connecting an amplifier
    • RS-232C port for automated control systems
    • detachable power cord
    • direct IR flasher input and 12V DC trigger out
    General Features:

    What's in the Box:

    • 7.1ch AV receiver
    • 6' AC power cord
    • Main remote control (RC-751R)
    • Zone 2 remote control
    • 3 "AAA" batteries
    • CR2025 3V Lithium battery
    • Auto-setup microphone (with attached 19.5' cable terminated by a 3.5mm connector)
    • FM wire antenna
    • AM loop antenna
    • Mini-to-RCA adapter
    • User's Manual (En/Fr/Sp/It)

    Cambridge Audio Azur 751R Reviews

    Average Customer Review(s):

    (6 Reviews)

    Great Receiver

    JohnP from Los Alamos, NM on 12/15/2014

    Crutchfield Customer Review (What's this?)

    Excellent sound. I have tried this both as a processor with an external amp, and as a stand alone receiver. The sound is quite simply excellent. There is no noticeable difference between the receiver's amp and the 225w/channel outboard amp. My speakers are PSB Stratus Minis and Stratus C6 up front, a pair of PSB300s crossed over at 80 Hz, and PSB Imagine Minis as surrounds. This is the first receiver I have ever owned that was actually up to the task of cleanly driving speakers. Previous receivers were Sony and Onkyo. The surround processing is much superior to my previous Onkyo. I set the surround levels with a calibrated microphone, and have always bumped the center channel up 2-3 dB to get clear dialogue in movies. I did not need to do that with the Cambridge. So far, excellent results. The default settings are quite good. There are not a lot of superfluous fluffy features, so if you want gadgets over sound or video, this is not your unit.

    Pros: Sound, video, ease of hookup, ability to cleanly drive low impedance loads.

    Cons: Speaker binding posts are not US standard. These have a larger spacing. Standard banana plugs do not fit. Binding posts seem a bit flimsy, but are easily used.

    The Cambridge Audio Azur 751R is absolutely OUTSTANDING.

    Bob from California on 10/11/2014

    Crutchfield Customer Review (What's this?)

    I have had several surround sound receivers in the past and a few that were very highly rated but the Cambridge Audio Azur 751R that I purchase, with the help of Paul (Crutchfield Advisor), is by far one of the best surround sound receiver that I have ever owned in my life. The video processing is superb but the quality of sound that I am constantly getting from this receiver is the most spectacular and addictive sound I have ever heard in my life. Very clean and dynamic, no background noise, works fully as advertised, build quality is outstanding and even the remote control is designed superbly. It's a very well designed and thought-out product. I was hesitant to buy it because it is very expensive but after using it at my home, I honestly feel that it is worth every bit of the money that it costs. So far, I am really very happy that I purchased it. Even the sound that I am getting from Sirius Radio played back in Stereo and attached to the aux inputs of the Cambridge 751R also sounds very depthful, dynamic and clean. This was a nice surprise for me. I am also getting superb results streaming computer music through the Cambridge 751R. Absolutely outstanding. And thank you again Paul (Crutchfield Advisor) for helping me make the best "product buy decision" in my life!

    Pros: Outstanding video and quality of sound, easy setup, superb build quality and RMS power to all channels.

    Cons: None.

    Solid Build, Brilliant Performance

    ksjack7 from Springfield, MO on 11/20/2013

    Crutchfield Customer Review (What's this?)

    Solid Construction, Everything you need without the fluff. HDMI Switching is smooth and responsive. 6 HDMI in and 2 Out. Video Quality is excellent. Part of the reason I purchased this unit was to replace a HDMI switch box I was using to switch between various sources. I did not realize how much picture quality I was sacrificing using the HDMI switch box. Suddenly everything was incredibly sharp and detailed. But when you hear the 751R is when you will fall in love. Streaming Apple-lossless files via my AppleTV through the 751R just blew me away. I had been thinking about replacing my speakers but the 751R gave them new life. Even my older LG Blu-ray players seems brand new again. Remote is ok..functional. Unit does seem a little pricey at first but when you get it home and sit back with your favorite movie or music you will not be disappointed. I could not be happier with my purchase. Thanks Cambridge Audio and as always Crutchfield rocks!




    Mike D from GA on 9/23/2013

    Crutchfield Customer Review (What's this?)

    The Cambridge Audio receivers are a "no frills" type product. They dont seem to be worth the asking price when you compare them to other brands. They look plain and bland. They dont have ethernet or pretty pictures on the OD. But believe me when I say that its beauty is in the performance. Video playback is absolutely top notch, but the audio is where this thing starts to make sense. If music and SQ are a priority and you dont need a host of useless options, this is your machine. I first purchased the 651R and was very happy with it (read my review on it). I traded up because I thought I needed the extra power for my new Polk RTiA7s which are very power hungry. I found out that there is very little noticable differance in power beween the 651 and the 751 and the price differance is not worth the power increase alone. But after reading up on the asynchronous USB, I decided to try it out. This is rare on a receiver of this price range. After downloading the software and trying it, I was impressed with the overall SQ. I decided to keep the 751 and start working with some "computer" music. If the USB and the digtial upscaling dont interest you, save some cash and buy the 651r. The cooling system works well with no shutting down at high volumes. I have ran this thing near wide open for hours at a time. This is a serious receiver that puts its reputation solely on its performance. It takes about 1 month for it to really smooth out. The build quality is first class also.

    Pros: video, audio, and build quality. Dynamic EQ works great. A real wolf in sheeps clothing.

    Cons: requires a breakin period for the audio to really open up.

    Amazing purchase

    Mike C from Long Island, NY on 4/20/2013

    Crutchfield Customer Review (What's this?)

    This receiver is a revelation. Blows away my Sunfire Theater Grand 3 by a long shot. Video is amazing, audio, which is my main reason for buying this receiver is nothing short of spectacular. SACD discs, BluRays, HDCD's, regular cd's...all shine, Satellite Radio comes through beautifully. Set up is a breeze, GUI is intuitive. I am entirely satisfied with this unit. I have it paired with a Cambridge 751BD BluRay/DVD player and I couldn't be happier. Order this if purity of sound and video are important. Lots of other 'extras' are not present here, but they are not missed by me. I'm not looking for fancy stuff, I just want the best video and the purest audio I can get from my sources and the Cambridge 751R gives it to me. Crutchfield have fulfilled my needs, perfectly, again. Many thanks.

    Pros: Price point, excellence of video/audio, ease of set up.

    Cons: None that come to mind.

    Amazing--Blown Away

    JPF from NYC on 4/4/2013

    Crutchfield Customer Review (What's this?)

    We purchased a 551 R to replace the ancient NAD in our bedroom. This thing was sooo good it blew away the main pre pro and monster amp package in our main room. Hmmm, all this money spent something is wrong. Went though the menus, confirmed settings, cable connections etc etc. Everything is right, but it sounds weak in comparison. So went online to check the reviews on this HTR and found nothing. Cruchfield's generous return policy convince me to take a risk. Out of the box, with no break in time it provided the warmth, clarity, and detail that had our jaws dropped. Movies that we watched many times over were revelations .Never heard before effects, background voices, etc, were pronounced without losing the main dialogue. Onto the music review. The asynchronous USB input is the same we use on our computer. 24/192 makes the music come alive. Hooking up my laptop made me grin ear to ear. Using the Cambridge Audio Blu Ray for my SACD and CD's in pure music mode was absolutely amazing. But, without pure music, I can have my mains operate with the sub's or without and control the sub level in a separate menu. Outstanding flexibility. Easy set up, no bells and whistles, just pure entertainment in a flexible package. Home run!

    Pros: Satisfies both music AND MOVIES

    Cons: Ask my neighbors


    Hands-on research

    Features and Specs

    Number Of Channels 7
    Stereo RMS Power (watts) 170
    THD in Stereo 0.006%
    Frequency Bandwidth (stereo) 1k Hz
    Minimum Impedance L/R 4 ohms
    Minimum Impedance Center 4 ohms
    Minimum Impedance Surround 4 ohms
    General Features
    Internet-ready No
    Bluetooth No
    Apple AirPlay No
    App Remote Control No
    USB port for iPod/iPhone No
    FM Sensitivity Not Given
    HD Radio Tuner No
    On-Screen Display Thru HDMI
    Auto Speaker Calibration Audyssey 2EQ Room EQ
    HDCP 2.2 for 4K Video No
    HDR-compatible No
    HDMI Standby Pass-through No
    4K Video Upscaling No
    HDMI to HDMI Upconversion Yes
    DLNA Certified
    MHL-compatible No
    Multibrand Remote Control No
    Learning Remote No
    LCD Remote
    Width (inches) 16-15/16
    Height (inches) 5-7/8
    Depth (inches) 17-3/16
    Weight (pounds) 38.3
    Parts Warranty 3 Years
    Labor Warranty 3 Years
    Multi-room Audio--Video
    Powered Multi-room Audio Output Yes
    Preamp Multi-room Audio Output Yes
    Multi-room Video Yes
    Multi-room HDMI Output No
    Surround Processing
    Dolby Digital DD, EX, TrueHD, DD+
    Dolby Atmos No
    DTS DTS, ES, HD, HDMA, Neo6
    DTS:X No
    Inputs & Outputs
    Phono Input No
    Audio-Video Inputs 5
    Audio-only Inputs 3
    Component Video Inputs 3
    Component Video Monitor Outputs None
    Optical Digital Inputs 5
    Coaxial Digital Inputs 5
    Optical Digital Outputs 2
    Coaxial Digital Outputs 2
    HDMI Inputs 6
    HDMI Monitor Outputs 2
    Subwoofer Outputs 2
    Multi-Channel Analog Input Yes
    Multi-channel Preamp Output Yes
    Main Speaker Output Pairs 1
    Main Speaker Terminals Posts
    Ethernet Port None
    USB Connections Type-B (rear)
    Removable Power Cord IEC 2-prong

    Product Research

    Audio Features
    Video Features
    Convenience Features
    Remote Control

    Audio Features

    Audiophile Components: The Cambridge Audio azur 751R employs a Toroidal transformer and isolated processing boards for a high purity, low-distortion signal. The AV receiver's X-Tract near-silent cooling system combined with a rigid low-resonance chassis maximizes the system's audio signal quality.

    • All-Metal Case: The all-metal case and brushed aluminum front-panel is very stable and introduces less resonance to the audio signal.
    • Isolated Processing Boards: The 751R features isolated input and video processing boards to ensure minimum noise distortion.
    • Toroidal Transformer: The Toroidal transformer delivers a high purity, low-distortion signal; plus better bass response.
    • X-Tract Cooling:  The Cambridge Audio azur 751R employs a unique cooling 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 751R can operate extremely quietly, at a low temperature and enables a more compact enclosure than would normally be possible.

    7 Discrete Amplifiers: Seven discrete amplifiers driven by a low-flux toroidal transformer are separated from the processing and input stages delivering ultra-low noise and distortion, thereby guaranteeing performance without compromise. This careful design of the amplifier stages ensure that the 751R can reproduce the dynamics required for movie and music soundtracks. The 7 channel amplifier is rated at 170 watts with 2 channels driven (1kHz, 8-ohms, 0.006% THD) or 120 watts with all 7 channels driven (1kHz, 8-ohms, 0.006% THD).

    Amplifier Assignment: The seven amplifier channels built into the receiver are typically used for 7.2 channel surround (Front L/R, Center, Surround L/R, Surround Back L/R, and Dual SW) in the main room. These seven amplifier channels can be configured to accommodate various home theater setups.

    • 7.1ch: Seven speakers are powered in the main room - Front L/R, Center, Surround L/R, and Surround Back L/R. Zone 2 will need to be powered by a separate amplifier. Bi-amplification is not an option.
    • 5.1ch + Height: Seven speakers are powered in the main room - Front L/R, Center, Surround L/R, and Front Height L/R (no Surround Back channels). Zone 2 will need to be powered by a separate amplifier. Bi-amplification is not an option.
    • Bi-Amp Mode: This receiver allows you to reassign the surround back amplifier channels to make bi-amp connections (compatible speakers required). A bi-amplification connection uses two amplifiers for one speaker. One amplifier is connected to the woofer section of a loudspeaker while the other is connected to the combined midrange and tweeter section. With this arrangement each amplifier operates over a limited frequency range, making its job easier. The receiver will be limited to 5.2ch surround in the main room, and Zone 2 must be powered by a separate amplifier.
    • Zone 2: You can also reassign the surround back amplifier channels to power speakers in Zone 2. The receiver will be limited to 5.2ch surround in the main room and you will not be able to bi-amp the front speakers.

    24-bit/192kHz DACs: The Cambridge Audio azur 751R utilizes a Cirrus Logic 192kHz/24-bit D/A converter on each of the unit's seven channels for exceptional sound quality. The 192kHz sampling and 24-bit word length capabilities of the DACs allows you to play high-resolution recordings and hear the increased clarity, detail and dynamic range of those recordings.

    ATF Upsampling: Cambridge Audio's unique ATF (Adaptive Time Filtering) upsampling technology, developed in conjunction with Anagram Technologies in Switzerland, boosts audio quality from any source to 24-bit/192kHz, while minimizing errors. All incoming audio data, (such as CD-Audio at 16-bit/44.1kHz or MP3), is upsampled to 24-bit/192kHz using a high-end 40-bit Analog Devices DSP (Digital Signal Processor). By using clever algorithms (or "Polymomial Curve Fitting Interpolation") to plot sample points to a curve, rather than a straight line, the ATF system gets closer to natural sound waves; delivering lower jitter levels, fewer timing errors, and a more naturally clear sound.

    Dual TI 32-Bit DSPs: The Cambridge Audio azur 751R employs dual Texas Instruments 32-bit DSPs (Aureus DA788) for compatibility with the latest Dolby Digital/DTS formats, Dolby Pro Logic/DTS Neo:6 surround processing, and Dolby Pro Logic surround processing.

    Note: Dolby Digital and DTS listening modes can only be selected if your audio source is connected to the A/V receiver via a digital audio connection (HDMI, optical, or coaxial). To enjoy true 7.1ch Dolby Digital TrueHD and DTS-HD surround sound, the receiver must be connected to your Blu-ray player via HDMI.

    Matrixed Surround Modes: These modes allow a surround-sound experience from source material that has no encoding at all. The surround sound effect is achieved by digital signal processing of the analog or digital stereo source used. Five modes are possible; Movie, Music, Room, Theatre, and Hall.

    Stereo Modes: The surround receiver also provides two-channel stereo playback, as well as an analog stereo direct mode.

    • Stereo/Stereo + Sub: Only the front left & front right speakers (and subwoofer if selected) have output in this mode. If an analog source is selected, it will be converted to digital via 24 bit A/D converters to allow digital domain sub creation and bass/treble controls. If a digital source is selected, the 751R will be processing either LPCM stereo (from the digital outputs of a CD player for instance) or a Stereo downmix of DD or DTS material (from the digital output of a DVD player for instance).
    • Analog Stereo Direct: Selects the analog inputs for the current source directly with no A/D conversion, DSP processing, Bass/Treble, or subwoofer channel active. Provides the very best fidelity for analog Hi-Fi source equipment. In this mode the 751R is acting just like a normal Hi-Fi integrated amplifier.
    • Multi-Channel Stereo: Create a multi-channel stereo presentation whereby the incoming Left and Right channels are output to the Front Left, Surround Left, Surround Back Left, and Front Right, Surround Right, Surround Back Right channels respectively. A mono-Subwoofer channel is also created.

    Dolby Pro Logic II/IIx Music Settings: While listening in the Dolby Pro Logic II/IIx Music format, there are three further enhancements you can adjust.

    • Panorama: A Prologic II/IIx mode that extends the front stereo image to the surround sound speakers for a more enveloping experience. This mode can be either On/Off.
    • Dimension: Allows gradual adjustment of the center image from being produced only by the Center speaker (Setting 0) through levels of being spread between the center channel and left and right speakers to finally being produced by the front left and right speakers only (Phantom Center, Setting 7). Useful in optimizing the front/center/right soundfield for best integration of the three speakers.
    • Center Width: Adjusts the soundfield to be gradually shifted from the front of the room to the back to suit taste, speaker positioning, and size of room. Setting 0 has the image furthest forward, 6 furthest back.

    DTS-HD Speaker Remap: As there is no official speaker layout for discrete 7.1 channel audio, it could be possible that the original master track of a 7.1 soundtrack was mastered with a different speaker layout than the one being used in your home. DTS has addressed this issue for DTS-HD Master Audio and High Resolution Audio by including in the bitstream flags to tell the receiving AV Receiver which of a seven nominal 7.1 speaker layouts was actually used. By using special DTS Speaker Remap algorithms the 751R is able to electronically "reposition" the speakers (i.e. direct the audio propagation), so that the playback matches the original encoded layout for the best possible sound quality.

    Audyssey Technologies: The 751R features a collection of Audyssey audio technologies for optimal sound quality. Audyssey 2EQ/Room EQ, Audyssey Dynamic EQ,  and Audyssey Dynamic Volume help achieve the best performance in your particular room and with your speaker setup.

    • Audyssey 2EQ/Room EQ: Audyssey 2EQ/Room EQ Auto Speaker Setup tailors the 751R's performance to any room and comes complete with a microphone to complete this simple procedure. Audyssey 2Q uses the measurement from up to 3 positions to correct room response in addition to the speaker settings. Using the supplied microphone, Audyssey 2EQ automatically determines the number of speakers you have connected, their "size" and crossover frequencies (for the purpose of bass management), plus their distances from the listening position.  Audyssey 2EQ/Room EQ can also remove deficiencies in playback caused by sub-optimal room acoustics. It does this by capturing any acoustical problems at the listening area in both the frequency and time domain and applying sophisticated corrective equalization. The result is an improved sound quality, clarity of dialogue, and a well balanced sound for more than one listening position. You can also choose to manually setup the receiver's speakers settings.  
    • Audyssey Dynamic EQ: Audio engineers mix music and movie soundtracks at reference levels much louder than typical home listening levels. At lower volumes the human ear perceives sound differently; voices change, bass dissipates, and the surround effect becomes less enveloping. Dynamic EQ adjusts the frequency response curve based on volume to maintain consistent bass output, octave-to-octave balance, and surround impact, resulting in rich sound at any volume. You can set the Dynamic EQ to 0, 5, 10, or 15 dB.
    • Audyssey Dynamic Volume: Audyssey Dynamic Volume solves the problem of large variations in volume level between television programs, commercials, and between the soft and loud passages of movies. Dynamic Volume addresses the issue of commercials that are too loud and movie soundtracks with vast differences between soft and loud passages; the results are more intelligible dialogue, loud passages maintain impact, and soft whispers are heard clearly. When the volume level changes, Dynamic EQ also adjusts the frequency response to maintain sound quality. You can set the Dynamic Volume to Heavy (late night listening), Medium (daily listening), Light (consistent dialog), or off (full dynamics).

    Individual Crossovers & Advanced Bass Management: The azur 751R provides individual crossover adjustments and advanced bass management settings.

    • Tone Controls: The azur 751R offers independent Bass (100Hz) & Treble (10khz) adjustment from -10 to +10dB.
    • Speaker Crossover: Each speaker (front/center/surround/surround back) and subwoofer crossover point can be adjusted from 40-150Hz (in 10Hz steps) and also to 200Hz.
    • LFE Trim: The LFE channel (for DD/DTS material) can also be trimmed by up to 10dB (in 1dB steps); useful for late night listening or other situations where it might be desired to reduce the low frequency effect level temporarily.
    • Bass Augment: You can select whether to play front channel low-frequencies through either the front speakers or the subwoofer, or through both the subwoofer and front speakers.

    Dynamic Range Control: This setting controls the dynamic range of Dolby Digital movie soundtracks by compressing the audio to limit the difference in level between loud and quiet passages in the movie. The receiver's Dynamic Range Control can be set to Auto, On, or Off.

    Audio Inputs/Outputs: The AV receiver offers a variety of analog and digital audio inputs/outputs.

    • Digital Inputs/Outputs: The azur 751R features optical (5 in/2out) and coaxial (5 in/2 out) digital connections. One optical digital input is located on the front-panel.
    • Binding Post Speaker Terminals: The receiver has binding-post terminals for all speaker connections. The binding-post terminals can accept bare wire, pin connectors, and banana plugs (single only). Speakers with an impedance of between 4-8 ohms are recommended.
    • 7.1ch Analog Inputs: The azur 751R features a 7.1 Channel input (Front left, Front right, Center, Surround left, Surround right, Surround Back left, Surround Back right, and Subwoofer) for connecting a DVD Audio player, Super Audio CD multi-channel player, or other component that has a multi-channel port so you can playback the audio with 5.1 channel or 7.1 channel surround sound.
    • 7.2ch Preamp Outputs: The A/V receiver features 7.1ch pre-amp outputs (Front L/R, Center, Surround L/R, Surround Back L/R, and Dual Sub) for connection to external power amplifiers.
    • MP3 Input: The A/V receiver is fitted with a front-panel 3.5mm input for temporary connection of your portable digital audio player.
    • Headphone Output: The receiver features a 1/4" stereo headphone jack on its front-panel for connecting a pair of optional headphones. Plugging in a set of headphones will automatically mute the main speakers and pre-amp outputs, while selecting a 2-channel stereo down-mix soundfield. Headphones with an impedance of between 32-600 ohms are recommended.

    AM/FM Tuner w/ RDS: The Cambridge Audio A/V receiver features a built-in AM/FM tuner with RDS. RDS is a method for the transmission of additional information from local radio stations. It is only available in FM mode. RDS will only work if the local broadcasting stations have RDS transmission and the signal is strong enough.

    Video Features

    Video Inputs: In terms of connectivity, the 751R boasts six HDMI inputs and dual HDMI monitor outputs which fully support 3D, Deep color, and Audio Return from newer flat-panel TVs. It also features a wide selection of analog video inputs (Component, Composite, S-video).

    • HDMI (ver.1.4): HDMI (High-Definition Multi-Media Interface) is an all digital connection that can carry both audio/video in one cable. Direct digital transfer of audio/video and support for various types of High Definition video content and high resolution audio make this the best connection type to use. The five rear-panel HDMI (1.4) inputs can be assigned to the BD/DVD, Video 1, Video 2, Recorder 1, Aux, CD Recorder 2, or 7.1 Direct sources. There is also a front-panel HDMI (1.3) input for connecting your high-definition camcorder. The two HDMI outputs are parallel so the same video signal is output through both and can be used simultaneously. 
    • Component: Three component vides input capable of supporting 480i, 480p, 720p, and 1080i video signals.
    • Composite: Five composite video inputs (4 rear/1 front) which support 480i only. There is also one composite video record output.
    • S-Video: Five S-video inputs (4 rear/1 front) support 480i only. There is also one S-video record output.

    Note: This receiver only features an HDMI monitor output (there are no analog monitor outputs). All analog video inputs will be upconverted to HDMI to send to your TV.

    Anchor Bay ABT2010 Scaler (up to 1080p): The A/V receiver's Anchor Bay ABT2010 video scaler upscales any source, including analog standard definition, to 1080p. Composite, Component, and S-video inputs can be upconverted to HDMI and scaled to 1080p.  Lower resolution incoming HDMI signals can also be scaled to 1080p. You can choose to bypass the scaler for a native resolution. The receiver also uniquely features a "bypass" mode to improve picture quality by avoiding the common problem of "double scaling", where your Blu-ray player, PS3 or video streamer has already upscaled content once, and your receiver then scales it again

    Note: 3D TV content, 24fps content, or other video standards that 751R cannot process or recognize are always bypassed and sent natively, without scaling.

    3D Pass-Through: With the advent of 3D media, it is important to own a receiver that recognizes 3D video signals. The 751R is able to pass through 3D signals from your Blu-ray player, ensuring that the 3D effect doesn't get lost in translation. It also recognizes signals from 3D television broadcasts. By connecting a 3D-compliant Blu-ray disc player and 3D-compliant TV to the 751R, you will have a 3D home theater where you can enjoy high-definition sound and video on a level you've never experienced before.

    Deep Color Support: The 751R also supports Deep Color content, which can display a larger color range than standard-definition schemes. The result is a more lifelike, vibrant picture.

    Audio Return Channel: This feature allows audio to be sent from your compatible HDTV to your receiver through the same HDMI cable already being used to send audio and video to your HDTV. This eliminates the need for extra cables connected to your television.

    Lipsync Adjustment: This feature compensates for the timing shift between the audio and video of the receiver. If needed, the audio signal can be manually delayed to match the video signal; adjust from 0-500ms (in 10ms steps).

    Audio Split: The 751R allows you to view one source while listening to another. You can be watching any video input (HDMI, Component, Composite, or S-video) on your connected TV and listen to a different analog (RCA) or digital (Optical/Coax) audio source through the receiver.

    Picture Adjustments: You can adjust the Resolution (480p/576p/720p/1080i/1080p), Frame Rate (Auto/50Hz/60Hz), Color Space (Auto/RGB/YCbCr422/YCbCr444), Aspect Ratio (Auto/4:3/16:9), and Color (Auto/ITU.601/ITU/.709) for the A/V receiver's HDMI monitor output.

    Front-Panel A/V Input: The unit's front-panel A/V input consists of a composite video input, S-video input, stereo RCA input, optical digital input, and 3.5mm aux input. 

    Convenience Features

    On-Screen Display (via HDMI): The AV receiver's on-screen menu provides quick information about your system's settings. You can easily make settings for your home theater system while viewing menus on the TV screen. Simple settings are enabled with the setting menus displayed on the TV screen. These menu displays can only be output to your TV via HDMI. The unit's front-panel LCD also displays the receiver's menu adjustments, as well as input source.

    Asynchronous USB Port: The azur 751R is fitted with a rear-panel USB (type-B) port to plug in your Windows or Mac laptop/computer. This USB port bypasses your laptop/computer's inferior-quality soundcard and instead upsamples your digital music library to 24-bit/192kHz for "better-than-CD-quality" digital audio file playback. The 751R is both USB 2.0 (Hi-Speed) and USB 1.1 (Full-speed) USB port compatible. It will also work with the new USB 3.0 ports where the PC will simply treat the AV receiver as if it were a USB 2.0 or 1.1 device.

    • PC Compatible: With the 751R switched to USB Audio 1.0 (this is the default setting), the receiver will work with the native Windows XP, Vista or 7 Audio 1.0 driver (no need to load any new driver) and accept audio up to 24-bit/96kHz. With the 751R switched to USB Audio 2.0, the receiver needs the Cambridge Audio USB Audio 2.0 Driver to be loaded and can then accept up to 24-bit/192kHz (and support ASIO and WASAPI Exclusive, if required).
    • Mac Compatible: No extra drivers are required to connect your Mac computer. With the 751R switched to USB Audio 1.1,  the receiver will work with the native Mac OS-X 10.5 (Leopard) or above Audio 1.0 driver and accept audio up to 24/96kHz. With the receiver switched to USB Audio 2.0 the 751R works with the native Mac OS-X 10.5 (Leopard) or Cambridge Audio's USB Audio 2.0 driver and can accept audio up to 24/192kHz.
    Note: Click here to download the Cambridge Audio USE Audio 2.0 Driver.

    Dual Room/Dual Source: The AV receiver's Zone 2 outputs allow you to play two different audio/video sources in up to two rooms. The receiver has dedicated stereo preamp outputs (2.1ch) for Zone 2, or the built-in amplifier can be configured to power speakers in the second zone. If Zone 2 speakers are powered by the receiver, the receiver is limited to 5.2ch in the main room. The volume of Zone 2 can be controlled by the Cambridge Audio receiver using either configuration or from your add-on amplifier when using the line-output. Zone 2 also offers a component-, composite-, and S-video output so you can watch an analog video source in another room.

    • Compatible Zone Sources: You can select the following input sources for Zone 2.
      • Analog Audio/Video Inputs (to watch video in Zone 2, you need to connect the Zone 2 video monitor out in the same way as the video input device; there is no video conversion)
      • AM/FM Tuner (you cannot select different AM/FM radio stations for each zone)
    • Incompatible Zone Sources: Optical/coaxial digital, HDMI, and USB audio sources are not output to Zone 2.

    Follow Main: The Follow Main function allows you to enjoy the AV receiver's Main Zone audio source in Zone 2, simultaneously (regardless of input audio signal types - analog or digital). Stereo playback is automatically selected for both zones when Follow Main is selected. Both the Main Zone & Zone 2 play at the same volume level during this mode. Utilize this function when you want to play back an audio source as background music in two rooms of your home.

    Source Naming: You can rename each input so the display reflects the actual source.

    Backup Memory: The 751R has a function that preserves the preset memory and other settings. In the event of a power failure, or if the power cord of the unit is disconnected from the mains outlet, the back-up memory will preserve the preset memory for approximately one week. If the power supply is interrupted for 7 days or longer, the memory settings will be erased.

    Auto Power Down: The 751R feature an automatic power down function and will by default shut down if no audio playback has been detected for 30 minutes.

    Firmware: The tested unit contain firmware version 1.43/1.45/1.09 (as of 1/30/2013).

    Remote Control

    IR Remote Control: The azur 751R comes with an IR wireless remote control that can operate this receiver's Main Zone and Zone 2 functions.

    Zone 2 Remote Control: The dedicated Zone 2 remote lets you adjust volume up/down and the source input of Zone 2 (an IR repeater system will be required). Volume up/down is only available when you are using the 751R to power speakers in Zone 2.

    Remote Connections: The Cambridge Audio azur 751R is fitted with the following custom remote connections.

    • IR Input/Outputs: The receiver has remote input (3) and remote output (3) minijack terminals (3.5mm) for use with external IR receivers
    • 12V Trigger Outputs: The 751R feature two trigger outputs (3.5mm) that can be used to signal to external devices for simple automation functions. The outputs are 0V for Off and 12V for On at up to 100mA.
    • Control Bus Input/Output: The Control Bus Input/Output (RCA) connections Allow un-modulated commands from multi-room systems or other components to be received by the unit.
    • RS232C Port: The RS-232C port is to be used in conjunction with an external controller to control the operation of the unit by using an external device. The RS-232C port may also be used in the future to update the operating software of the unit so that it will be able to support new digital audio formats.

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    Q & A

    Customer Q&A

    2 questions already asked

    This receiver is optimized for connection to a 1080p display. For more information on 4K compatible products you can connect with an Advisor by phone or chat. [ Jeff  Nov 25, 2013 ]  Staff