Cambridge Audio AZUR 851W (Silver)

Stereo Power Amplifier

In stock
£1,699
When combined with the equally impressive 851E or 851D, the Cambridge Audio 851W power amplifier is quite simply the best sounding Cambridge Audio amplifier ever.

Massive power for effortless sound, whatever the speakers

Take a look at the figures and it soon becomes clear that, when it comes to power, the 851W isn't going to take any prisoners! With a genuine 200 watts per channel at 8 ohms the 851W has a cast iron grip on any speaker, no matter how difficult the load. With a 4 ohm load this figure increase to 350 watts per channel. Should you choose to use two 851Ws in bridged mono mode, these outputs increase to a jaw-dropping 500 (8 ohms) or 800 (4 ohms) watts per channel.

Twin toroidal transformers
At its heart, the 851W is powered by twin toroidal power supplies. Separate transformers for the power amplification and input ensure the audio performance is unaffected by large current requirements caused by powerful and dynamic music from current hungry speakers. What this means in terms of sound quality is deep, effortless bass with thunderous dynamics on tap.

Terrapin impedance buffering modules for enhanced detail
Cambridge Audio's own Terrapin impedance buffering modules replace the more commonly used op-amps for a further leap in audio quality. Terrapin impedance buffering modules separate amplifier and signal impedance, delivering an even and consistent sound with enhanced separation and imaging.

Unique Class-XD Amplifier
What makes this amplifier extra special is the Class XD amplification. Technically speaking, this combines the best qualities of Class A amplification - smoothness and realism - with the best from Class AB - power and control, without the disadvantages inherent with both designs. What this means to the listener is a smooth, yet detailed sound quality with the ability to drive almost any speaker from its substantial power output.

Full metal casing with extensive damping
Using a full metal casing, with rounded edges, doesn't just look and feel good, it helps the sound, too. The case is rigid and well damped, meaning that it won't resonate unhelpfully. The thick aluminium front panel looks the part and also acts as a shield against electrical interference from sources such as dimmers and RF devices. All these details combine to create an amplifier that not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

For an amplifier with power to spare yet the finesse to impress, the Cambridge Audio 851W is in a league of its own.

Click here for link to our blog review

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Our experienced advisors are able to visit you at your home or place of work today, to help select the right equipment at the best prices.

6 Year Supercare £169.90

Add our Supercare to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Free UK delivery

Next day delivery and timed options available for online purchases of selected products. Please see checkout for further details.

Buy now, pay later For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Find out more

We offer 6 month interest free options. Call or ask in-store for details

Lowest price guaranteed! We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 7 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trace in discounts.
T&Cs apply

We’ll beat any genuine advertised price, even from the web & give you up to £100!

When combined with the equally impressive 851E or 851D, the Cambridge Audio 851W power amplifier is quite simply the best sounding Cambridge Audio amplifier ever.

Massive power for effortless sound, whatever the speakers

Take a look at the figures and it soon becomes clear that, when it comes to power, the 851W isn't going to take any prisoners! With a genuine 200 watts per channel at 8 ohms the 851W has a cast iron grip on any speaker, no matter how difficult the load. With a 4 ohm load this figure increase to 350 watts per channel. Should you choose to use two 851Ws in bridged mono mode, these outputs increase to a jaw-dropping 500 (8 ohms) or 800 (4 ohms) watts per channel.

Twin toroidal transformers
At its heart, the 851W is powered by twin toroidal power supplies. Separate transformers for the power amplification and input ensure the audio performance is unaffected by large current requirements caused by powerful and dynamic music from current hungry speakers. What this means in terms of sound quality is deep, effortless bass with thunderous dynamics on tap.

Terrapin impedance buffering modules for enhanced detail
Cambridge Audio's own Terrapin impedance buffering modules replace the more commonly used op-amps for a further leap in audio quality. Terrapin impedance buffering modules separate amplifier and signal impedance, delivering an even and consistent sound with enhanced separation and imaging.

Unique Class-XD Amplifier
What makes this amplifier extra special is the Class XD amplification. Technically speaking, this combines the best qualities of Class A amplification - smoothness and realism - with the best from Class AB - power and control, without the disadvantages inherent with both designs. What this means to the listener is a smooth, yet detailed sound quality with the ability to drive almost any speaker from its substantial power output.

Full metal casing with extensive damping
Using a full metal casing, with rounded edges, doesn't just look and feel good, it helps the sound, too. The case is rigid and well damped, meaning that it won't resonate unhelpfully. The thick aluminium front panel looks the part and also acts as a shield against electrical interference from sources such as dimmers and RF devices. All these details combine to create an amplifier that not only looks stylish but also offers exceptional resistance to both mechanical and electrical interference.

For an amplifier with power to spare yet the finesse to impress, the Cambridge Audio 851W is in a league of its own.

Click here for link to our blog review
More Information
Analogue RCA Inputs 1 pair (with loop out)
Audio Outputs RCA + XLR Loop output
Bluetooth No
Coaxial Digital Inputs No
Dimensions WxDxH 430 x 365 x 148
Dimensions WxHxD (mm) 148 x 430 x 365mm
DLNA Compliant No
Frequency Response 5 - 80,000
Headphone Output No
Internet Radio Services No
Loudness Control No
MP3 Front Input No
Optical Digital Inputs No
Phono Input No
Power Amp In Yes
Power Consumption- Normal Use 2400
Power Consumption - Standby 0.5
Power Output 200 x 2
Pre Output No
Remote Control No
Speaker Sets 1 (Twin for bi-wiring)
Sub Output No
Tone Controls No
Tuner Radio No
USB Input No
Weight (KG) 19.1
Wireless Connection No
XLR Inputs 1
Brand Cambridge Audio
Colour Silver
Rated 5 out of 5 by from Stunning looking and exceptional build I bought an 851W 6 months or so previously and was so impressed I decided to buy another and bridge them, wow....sounds superb with so much power, but with incredible musicality, very happy customer
Date published: 2017-10-31
Rated 5 out of 5 by from Perfect powerhouse This amplifier is simply superb. It has a powerful, clean sound and can easily drive large or challenging speakers. I got a real step up in sound quality when I plugged it in, much firmer bass and wider soundstage. Easily drives my large 4 Ohm floorstanders plenty left in the tank. You could get two of them and bridge them into monoblocks but I'd be worried that you'd cause structural damage to your house. Easy to set up, works well with pretty much any equipment and sounds fantastic. I'd have happily paid twice as much to be honest.
Date published: 2016-08-19
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£1,699
Cambridge Audio Stereo Power Amplifier is rated 5.0 out of 5 by 2.
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  • REVIEWS, PRODUCT

We'll happily come to you!

Our experienced advisors are able to visit you at your home or place of work today, to help select the right equipment at the best prices.

6 Year Supercare £169.90

6 YEAR SUPERCARE COSTS JUST £9.99 ON ALL ITEMS UNDER £100, OR 10% OF PURCHASE PRICE ON ANYTHING OVER £100.

We think you’ll agree that our Supercare guarantee offers fantastic value. What’s more, if you don’t use our it in the 6 year period, we’ll refund the cost of it. You really can’t say fairer than that!
Plus, if we can’t fix a fault, we will give you a like-for-like replacement.
Find out full details here.

Add our Supercare to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Free UK delivery

Next day delivery and timed options available for online purchases of selected products. Please see checkout for further details.

Buy now, pay later For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Find out more

We offer 6 month interest free options. Call or ask in-store for details

Lowest price guaranteed! We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 7 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trace in discounts.
T&Cs apply

We’ll beat any genuine advertised price, even from the web & give you up to £100!

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