CAMBRIDGE AUDIO Azur 851W Stereo Amplifier (Black): Manufacturer RefurbishedusedCAMBRIDGE AUDIO Azur 851W  Stereo Amplifier (Black): Manufacturer Refurbished – Full Warranty; 52% Off + FREE SHIPPINGCAMBRIDGE AUDIO Azur 851W Stereo Amplifier (Black & Silver): Manufacturer Refurbished – Full Warranty; 52% Off MSRP: $2799.95 USD pcX Price: $1349.95 USD 52% Off Retail + FREE...1349.95

CAMBRIDGE AUDIO Azur 851W Stereo Amplifier (Black): Manufacturer Refurbished – Full Warranty; 52% Off + FREE SHIPPING

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Ships fromBurlington, Ontario, L7L 5J7
Ships toUnited States and Canada
Package dimensions20.0" × 20.0" × 10.0" (47.0 lbs.)
Shipping carrierUPS
Shipping costFree
Original accessoriesBox, Manual
AverageResearch Pricing

CAMBRIDGE AUDIO Azur 851W Stereo Amplifier (Black & Silver): Manufacturer Refurbished – Full Warranty; 52% Off

MSRP:        $2799.95 USD 

pcX Price:  $1349.95 USD       52% Off Retail + FREE SHIPPING

Parts Connexion is an Authorized Cambridge Audio Dealer


The 851W is their flagship power amplifier, with immense power and incredibly low distortion. It’s perfectly matched to partner our 851E pre-amplifier and 851N network player; taking their pure signal and amplifying it with huge presence and authority. You’ll re-discover your favourite music in a quality that you’ve never heard before.

Class XD: Rather than use a Class A design, which is sonically brilliant but generates vast amounts of heat, or a Class AB design, which is efficient but sonically limited, we developed our own Class XD amplifier design which the 851W takes advantage of. This has the sonic purity of Class A and the efficiency of Class AB for the best of both worlds.

Terrapin Buffering: When designing a stereo system, listeners are often encouraged to think about system matching, where components are handpicked to provide the best overall sound quality. People often assume this is due to the different audio characteristics, but frequently it is due to impedance (the relationship between voltage and current input/output) matching components. Products perform at their optimum when their input and output impedances match. This isn’t always possible though so we decided to develop our unique Terrapin impedance buffering module. This enables the 851W to be paired with a huge variety of audio sources and pre-amplifiers of varying impedance without risking any sacrifice in musicality or overall audio performance.

Power and Control: To build the 851W to be the best toroidal transformers were essential. But rather than use one for everything we designated one for the sound amplification itself, and another for the input circuitry. This means the signal is unaffected by audio output volume, so always sounds fantastic. The primary toroidal transformer provides unrestricted power to the dual mono amplification blocks. It’s a true audiophile transformer that will operate without distortion and with no buzz, interference or hum. The second smaller toroidal transformer takes care of pre-amplification processes. View the videos below for an insight on why we use toroidal transformers.

Flexible Control: The 851W can be used in stereo, bi-amped or bridged mono configurations. In bridged mono mode into 8 Ohms the 851W is a 500W monoblock amplifier. Into 4 Ohms, this figure increases to an incredible 800W. It can be paired with our 851E pre-amp, any of our digital pre-amps such as the 851N or CXN, or any other analogue pre-amps, and thanks to our Terrapin buffering module it will always sound perfectly matched.

Cap 5 Protection: Our proprietary CAP 5 protection system protects the 851W, plus any connected equipment and speakers, ensuring ultimate reliability and peace of mind. For more information on this unique development have a watch of the video below.

"These amps represent a genuine introduction to true high-end amplification at the same time offering real value for money. Features-wise they’re fully loaded."

- Hi Fi News, GB, April 2014.

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