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It's rare to find an amp as versatile as the 651R in its class. Unusually, the 651R is equally at home delivering the passion and fidelity of truly inspiring stereo music as it is making you leap out of your seat to big-screen surround sound action.
The video, of course, is no slouch too. The 651R's Anchor Bay ABT2010 scaler will coax 1080p Full HD detail out of even analogue video signals. And 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).
For truly stunning home cinema, the 651R features top-end 7.1 outputs (with option to run twin subwoofers), dual Texas Instruments 32-bit DSPs to support the broadest 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 home cinema receivers will only let you hear analogue sources elsewhere).
Another feature of the 651R that's rarely found elsewhere 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 651R 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 - 175W RMS power in stereo (2 channels at 6 ohms); 100W RMS power per channel for home cinema surround sound (7 channels at 8 ohms). Yet that power doesn't cost the earth - the 651R features an environmentally friendly standby mode that uses less than 1Watt.
Stunning power, stunning audio reproduction, stunning amplifiers - the Cambridge Audio Azur 651R Home Cinema Receiver is perfect if you want the best in home cinema sound and visuals and the best in hi-fi stereo sound, all in one surprisingly affordable package ...Read more


| 175 watts RMS per channel |
| 4 HDMI inputs, 2 HDMI outputs |
| Anchor Bay ABT2010 scaler video |
| 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 |
| Audyssey 2EQ Room EQ, Dynamic Volume, Dynamic Loudness and Autosetup |
| 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 |
| Independent Zone 2 audio and video output |
| Supplied with separate zone 2 remote control |
| Twin subwoofer outputs |
| Individual Crossovers and Advanced Bass Management |
| 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, IR Outputs, Trigger outputs |
| Low resonance, acoustically damped full metal chassis |
| Pure Analogue Stereo Direct |
| Also controllable from 651BD/751BD remote |
| Power output |
175W RMS per channel, into 6 ohms (two channels driven) 140W RMS per channel, into 8 ohms (two channels driven) 100W 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 |
| Architecture |
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 Conversion |
Two TI Aureus DA788 32-bit DSPs Anchor Bay ABT2010 scaler |
| Audio Inputs |
8 x Line Level Analogue Tuner (FM/AM) 7.1 multi-channel analogue Input 5 x digital co-axial, 5 x digital optical |
| Video Inputs |
4 x HDMI 3 x Component Video 4 x Composite 4 x S-Video |
| Main Audio Outputs | 7 x 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 Digital Optical |
| Other connections |
1 1/4" / 6.35mm Headphone Output (32 To 600 ohms recommended) 3 x IR emitter outputs, 1 IR Receiver Input (un-modulated), 1 IR Emitter Input (modulated),1 x zone 2 IR emitter input, 1 control bus input/output 2 x 12V trigger outputs 1 RS232C, 1 IEC type mains inlet |
| Max. power consumption: | 1400W |
| Standby power consumption: | <0.5W |
| Dimensions (W x H x D): | 430 x 150 x 420mm (16.9 x 5.9 x 16.5’’) |
| Weight: | 17.4Kg (38.3lbs) |