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It's rare to find an amp as versatile as the 751R in its class - equally at home delivering the passion and fidelity of truly inspiring stereo music as it is at making you leap out of your seat to big-screen surround sound action. And the 751R is designed not only to deliver the best possible picture and sound from the latest sources, but also to upsample and scale older, even analogue, sources, finding new details in old media...Read more
USA, Summer 2013
The 751R's Anchor Bay ABT2010 scaler will coax 1080p Full HD detail out of even analogue video signals, but the amp also features a unique scaler bypass mode that improves picture quality by preventing "double-scaling" content that has already been upscaled externally (for instance on a Blu-ray player or PS3).
And as well as video upscaling, the 751R features audio upsampling. Detail from any audio source, from MP3s to high-end digital audio streams, can be boosted to up to 24-bit/192kHz better-than-CD-quality. Digital audio files from laptops etc. can also be upsampled via the asynchronous USB input, bypassing soundcards for maximum quality and delivering 24-bit/192kHz ultra-high-quality audio.
As well as comprehensive upscaling and upsampling capabilities, the 751R has the full range of top-end home cinema receiver features: 7.1 outputs (with option to run twin subs), two Texas Instruments 32-bit DSPs to support a broad range of surround formats and speaker layouts, and a comprehensive range of HDMI inputs and outputs. It also features our unique "Follow Main" Zone 2 option.
"Follow Main" lets you listen to the same digital source as is playing in the main room, in another room (most modern amps will only let you hear analogue sources elsewhere).
Another feature rarely found elsewhere for the 751R is DTS remapping. This lets you easily rephrase DTS-HD High Resolution and Master Audio format audio signals to your 7.1 speaker layout perfectly.
For brilliant, pin-sharp audio - in both stereo and surround modes - the 751R features a range of quality components that fit with our principle of designing for "Sound First". Toroidal transformers for a high purity, low-distortion signal, discrete amplifiers to reduce noise and X-Tract near-silent cooling combined with a rigid low-resonance chassis maximise audio signal quality.
And there's plenty of room-filling power too - 200W RMS power in stereo (2 channels at 6 ohms); 120W RMS power per channel for home cinema surround sound (7 channels at 8 ohms).
Stunning power, stunning audio reproduction, and the best audio and video from any source - the Cambridge Audio Azur 751R Upsampling Home Cinema Receiver is the ultimate home cinema receiver if you want the best in surround sound and visuals and the best in audiophile hi-fi stereo sound, all in one package. Our technology makes the most of every digital detail, so you literally get more out of your movies and music.
The 751R is designed from the ground up to perform at its peak not just when driving up to 7.1 surround sound speaker set-ups, but also to deliver stunning, pin-sharp stereo music from your main front speakers. Such versatility is rare indeed.
Using proprietary Anagram Technologies, Swiss-engineered algorithms developed originally for high-end audiophile applications, this boosts audio quality from any source to 24-bit/192kHz, while minimising errors. What's so special about ATF upsampling? By using clever algorithms to plot sample points to a curve, rather than a straight line, the ATF system gets closer to natural soundwaves - it's crazy science, but it works brilliantly, delivering lower jitter levels, fewer timing errors and a more naturally clear sound.
At Cambridge Audio, we're huge fans of what these premium components can do for audio quality. So, while other people save them for their top-of-the-line separates, we put them everywhere we can. As well as delivering a high purity, low-distortion signal they deliver a better bass response. For pure audio quality and minimum distortion, we accept nothing less.
Our near-silent cooling combination of funnelling heat through a heatsink and thermostatically-controlled fan means that our systems stay cool without delivering distracting noise. Only at moments of peak power use will the fan really be at full speed (and those moments, of course, will be when you won't be able to hear it).
High-quality and up-to-the-minute digital signal processors mean the 751R plays all the latest audio formats including: Dolby Digital, DTS, Dolby Pro Logic II/x/z, Dolby True HD, Dolby Digital Plus, DTS-HD Master Audio, DTS-HD High Resolution Audio and many more.
|200 Watts RMS per channel|
|6 x HDMI in, 2 out with support for 3D TV / Deep colour passthru / Audio Return Channel reception|
|Anchor Bay ABT2010 scaler video scaler for upscaling and analogue 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|
|Dual Texas Instruments 32-bit DSPs for compatibility with the latest CODECs including Dolby Digital Plus, DTS- HD High Resolution and the Lossless Dolby True HD and DTSHD Master Audio formats|
|Additional DSP performing 24-bit/192kHz ATF audio upsampling on all channels|
|Pure Analogue Stereo Direct mode for audiophile playback of analogue stereo sources|
|Audyssey 2EQ Room EQ, Dynamic Volume, Dynamic Loudness and Autosetup for the best performance in almost any environment|
|Full 5.1/7.1 multi-channel analogue inputs and preamp outputs|
|DTS Speaker re-mapping or Prologic IIz post processing for 5.1 + Height configurations|
|Individual Crossovers and Advanced Bass Management|
|Independent Zone 2 audio and video output|
|Neo:6 or Prologic II or IIz post-processing|
|Supplied with separate zone 2 remote control|
|Twin subwoofer outputs|
|Asynchronous USB audio input allowing high resolution audio streaming from computer|
|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 Inputs and Outputs, Trigger outputs|
|Low resonance, acoustically damped full metal chassis|
|Also controllable from 651BD/751BD remote|
Our unique ATF2 (Adaptive Time Filtering) upsampling technology, developed in conjunction with Anagram Technologies, Switzerland.
All incoming audio data, such as CD at 16-bit 44.1kHz CD, is upsampled to 24-bit 192kHz using a high-end 32-bit Analog Devices DSP (Digital Signal Processor). "Polynomial Curve Fitting Interpolation" provides a much more accurate upsampled audio soundwave than traditional upsampling processes. And a unique timing system buffers audio data to almost eradicate digital jitter. Vital – as jitter, common in digital audio devices, loses vital detail, often leaving digital audio sounding flat and lifeless.
Our latest ATF2 DSP also features a selectable digital filter with three settings to suit listener preferences and their particular system set-up:
• The Steep roll-off filter exhibits strong attenuation of aliasing images outside the pass band (i.e. above 22.05kHz) at the expense of a little pre and post-ringing in the time domain.
• The Linear phase filter uniquely features ‘constant group delay’ which delays all audio signals at all frequencies by the same amount meaning all audio is fully time-coherent at the output.
• Minimum phase meanwhile does not feature constant group delay but rather the co-efficients have been optimised without feed-forward so that the impulse response exhibits no pre-ringing in the time domain.
USA, Summer 2013
USA, Spring 2013
Spain, Spring 2014
India, Summer 2013
200W RMS per channel, into 6 ohms (two channels driven)
170W RMS per channel, into 8 ohms (two channels driven)
120W RMS per channel, into 8 ohms (all 7 channels driven)
|HDMI||HDMI 1.4a, EIA/CEA - 861D, HDCP 1.1, ARC and 3D-TV/deep colour pass through 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
Two TI Aureus DA788 32-bit DSPs
Additional AD SP-21261 40-bit DSP performing 24bit/192kHz ATF Upsampling
Anchor Bay ABT2010 scaler
USB 1.0: 16-24-bit, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz
USB 2.0: 16/24-bit 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz
8 x line level analogue
7.1 multi-channel analogue input
1 x asynchronous USB audio input
5 x digital co-axial, 5 x digital optical
6 x HDMI (5 x HDMI 1.4a, 1 x front panel HDMI 1.3c)
3 x Component Video
4 x Composite
4 x S-Video
|Main Audio Outputs||
7 Amplified Speaker Outputs
7.2 Preamp outputs
|Main Video Output||2 x HDMI (1.4a), ARC through HDMI A|
|Zone 2 Outputs||Surround back channels, 2.1 preamp audio outputs, component, S-Video and composite video outputs|
|Recording Audio Outputs||
2 x Line Level Analogue
2 x Digital Co-Axial, 2 x Digital Optical
1 1/4" / 6.35mm Headphone Output (32 To 600 ohms recommended)
3 x IR emitter outputs
1 x IR Receiver Input (un-modulated)
1 x IR Emitter Input (modulated)
1 x Zone 2 IR emitter input
1 x control bus input/output
2 x 12V trigger outputs
1 x RS232C
1 x IEC type mains inlet
|Frequency response||10Hz - 20kHz ±1dB|
|S/N Ratio||>90dB 'A' weighted|
|Max. Power Consumption||1700W|
|Standby power consumption||<0.5W|
|Dimensions (W x H x D)||430 x 150 x 420mm (5.9 x 16.9 x 16.5’’)|