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Cambridge Audio AZUR 840W

Cambridge Audio AZUR 840W
alaAverage 4.3

4 reviews

May, 2018

alaTest has collected and analyzed 4 reviews of Cambridge Audio AZUR 840W. The average rating for this product is 4.3/5, compared to an average rating of 4.1/5 for other Receivers & Amplifiers for all reviews.

On average, users rate this product 100/100 and experts rate this product 70/100.

Review analysis

(Based on 4 reviews)

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Expert review by : Jim Swantko (

Cambridge Audio Azur 840W Amplifier Reviewed


The stereo Azur 840W from Cambridge AUdio has 200 watts per channel, and an understated design that reviewer Jim Swantko wasn't too sure about. He did like that you could bridge the channels to be 500 watts. ...

The 840W is a powerful amplifier that can drive virtually any loudspeaker with authority. This is not simply a muscle amp, however, as it also has the ability to convey detail and nuance against a very quiet background ; For those who crave even more...

The Cambridge 840W generates loads of heat, so be prepared to adjust your air conditioning accordingly. Those perforations in the chassis aren't just for show ; The 840W face is a little bland for my tastes, and isn't the type of component which can...

Cambridge Audio has built one hell of an amplifier with the Azur 840W and it is an absolute bargain at the price they are asking for it. It sounded terrific with virtually every style of music I put through it, especially intimate acoustic...

Sep, 2009

Consumer review (

Cambridge Audio Azur 840W Class XD™ 2-Channel Amplifier


The first word on the "Description" says Breathtaking. I couldn't agree more.

Mar, 2010

Consumer review (

its been good to me and has plenty of power.


cheap, balanced inputs. its been good to me and has lots of power, doesn't fade all the way silent when fading left to right or right to left. i do love it it is very neutral though.

inexpensive, grunty, neutral sound [could be a con for some]

runs hot, although this doesn't seem to effect anything. Some interference through speakers [crackling] but very rare, may be my an earth problem of my old houses wiring.

Sep, 2011

Product Specifications

Second-Generation Class XD Technology Cambridge Audio's Azur 840W is a high-end power amplifier designed by the same team behind the critically acclaimed 840A. The 840W uses an evolution of Cambridge Audio's hugely innovative Class XD technology for a highly detailed, naturally musical performance. The second generation Class XD is now complemented by a new output stage that has been "Product of the Year" 2008 - The Absolute Sound Magazine carefully adjusted to integrate with this novel technology, along with revised balanced inputs for lower distortion and noise. An awesome power delivery of 200-watts-per-channel at 8 ohms gives excellent load driving ability. Or a truly massive 500-watt bridged mono can be harnessed for driving 'difficult' high-end speakers. At the core of the 840W's strength is a patent pending, Class XD (crossover displacement) technology. This innovation first used in the 840A has been subtly revised following continuing post-launch development and critical evaluation. Uniquely, XD gives pure Class A operation at low levels, moving smoothly into an enhanced version of Class B at higher levels. This system should not be confused with Class AB, which inherently generates greater distortion at high levels than a pure Class B design. XD technology feeds a controlled current into the output stage actively displacing the crossover point in a new way, so that the usual Class B crossover point no longer occurs at zero volume -- the worst possible position in terms of audible distortion -- but at a significant output level. The result is a smooth and linear transition between the two modes of operation, which differs significantly from the abrupt gain transition of a Class AB amplifier. To facilitate this, the Azur 840W amplifier includes a massive, oversized low flux toroidal transformer, incorporating a silicone-steel screen. New Output Stage Topology In Cambridge Audio's ongoing development of Class XD, the company has conducted