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Azur 651A Integrated Amplifier

The all new Cambridge Audio 651 will make all your music sound amazing

Thanks to the explosion in digital music, for many people the personal computer has become more important than their towering CD collections.

So we listened to you and instead of adopting the more common and simpler approach of including USB connectivity on a CD player, we've developed a direct USB audio connection to the 651A amplifier. So now, you can simply plug your Mac or PC directly into the 651A amplifier and with the addition of your chosen speakers, you'll instantly enjoy a whole world of digital music stored or streamed from your computer.

Computers are fast becoming a great addition to the hi-fi but they're not without their faults. Poor quality soundcards plus jitter - a side effect of digital music stored on computer hard drives - means audio performance can be really lousy. But plug your PC into the 651A and you'll be amazed just how incredible it sounds. Our in-house developed USB audio processor extracts audio data directly from your PC hard drive - bypassing its soundcard - and takes care of the critical digital to analogue conversion process bringing dull and lifeless MP3 files alive like you've never heard them before!...Read more

 

 
 
 

Reviews

Hi-Fi Choice

"Excellent affordable integrated amplifier, with an endearing character...

...A true everyman's amplifier this comes festooned with facilities."

 

UK, November 2012

Diapson dor-2012

651C and 651A both win a prestigious French award, a Diapason D'Or!

 

France, November 2012

Diapson dor-2012

"The 651A is a confident performer, with excellent levels of clarity balanced by an impressive soundstage...

...what sets the Cambridge Audio 651A apart is its sound quality which makes it exceptional value for money."

 

UK, September 2012

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In more detail

toroidal transformer grid5

At Cambridge Audio we don't believe in gimmicks. Instead we like to invest in components that really make a difference to the sound you hear. That's why in the 651A, we use a premium toroidal transformer which is key to its unruffled performance with music of all types.

Adding to the audiophile specifications are separate transformer taps for left & right channels, twin rectifiers and separate PSUs for dual-mono operation of the left and right power amplifiers. Meanwhile a high grade film type volume pot means the 651A also performs as well at low levels as at higher volumes.

Whatever hi-fi speaker you choose, the 651A is designed to drive almost any model with ease. Our retuned output stage featuring Sanken output transistors gives excellent bass response and dynamic control.

We all like to crank up the volume from time to time and our proprietary CAP5 system ensures unrivalled peace of mind against overloads, faults and clipping.

 

Meanwhile, connection support for analogue sources like CD players, iPod docks and tuners is better than ever so whether you store or stream music from your computer, iPhone or maybe you prefer the luscious sound of good old vinyl, the all new Cambridge Audio 651 will make all your music sound amazing.

 

Class-leading power of 75 Watts per channel remains another massive advantage and a whole host of custom designed components together with our legendary approach to design means whatever you're listening to, it'll simply sound fantastic.  

 

Features
Audiophile grade oversize toroidal transformer and substantial extruded heatsink allowing 2 x 75 Watts RMS into 8 ohms
USB audio input allowing USB audio streaming from computer
Separate transformer taps for left and right channels, twin rectifiers and separate PSUs for dual mono operation of the left and right power amps
ALPs film type ‘black box’ volume pot for superb low level channel balance and stereo imaging
CAP5 protection technology to enhance performance at high volumes
Low dissipation polypropylene signal capacitors and custom made electrolytic capacitors in critical positions
Acoustically damped full metal chassis with thick brushed aluminium front panel
Front mounted 3.5mm iPod/MP3 player connection
Eco-friendly <1W Standby power consumption
Available in black and silver finishes

Reviews

Hi-Fi Choice

"Excellent affordable integrated amplifier, with an endearing character...

...A true everyman's amplifier this comes festooned with facilities."

 

UK, November 2012

Diapson dor-2012

651C and 651A both win a prestigious French award, a Diapason D'Or!

 

France, November 2012

Diapson dor-2012

"The 651A is a confident performer, with excellent levels of clarity balanced by an impressive soundstage...

...what sets the Cambridge Audio 651A apart is its sound quality which makes it exceptional value for money."

 

UK, September 2012

What Hi-Fi? Sound and Vision
 

"651C is a good-looking, spacious-sounding disc spinner...

...651A is a meaty, powerful-sounding amp."

 

UK, March 2012

Specifications

Power output 75W RMS into 8 Ohms
THD (unweighted) < 0.002% @ 1kHz, 80% of rated power
< 0.03% 20Hz - 20kHz, 80% of rated power
< 0.02% 20Hz - 20kHz @ 10W
Frequency Response 5Hz - 50kHz (-1dB)
S/N ratio (ref 1w): >92dB (unweighted)
Input Impedance: 47k ohms
Power amp damping factor: >100 at 1 kHz
Max. Power Consumption 600W
Standby power consumption <1W @ rated mains
Shelving, ultimate boost/cut
+/- 7.5dB @ 20Hz and 20kHz
USB audio input USB Audio 1.0
16 bit 32kHz, 44.1kHz, 48kHz.
Dimensions (W x H x D) 430 x 120 x 350mm (16.9 x 4.7 x 13.8")
Weight 8.4Kg (18.5lbs)