Cambridge Audio

Azur 840A V2

Integrated Amplifier

Retail $1,799 CDN

(silver or black finish)

Contact us for a sale price

The 840A V2 now embraces the second generation of Cambridge Audio’s patent pending proprietary technology and has employed some subtle but significant updates to improve upon this already outstanding design. The second generation Class XD is now complemented by a new output stage carefully adjusted to integrate with this novel technology, revised balanced inputs for lower distortion and noise, and a new more accurate volume control with even lower crosstalk for greater stereo imaging.

With Cambridge Audio’s patent pending proprietary Class XD™ technology, the 840A V2 brings together the quality of Class A amplification, the power economy of Class B designs, and most amazingly of all, avoids many of the distortion pitfalls inherent in Class AB designs.

Completely separate pre-amp and power amp toroidal transformers and circuits make the 840A V2 effectively a pre and power amplifier combination in one chassis

Another enormous benefit is its ability to integrate seamlessly with a home cinema system. Fixed level inputs allow the 840A V2 to provide the front channel amplification to systems which use an AV receiver. The receiver continues to provide centre and rear amplification.

In addition to this innovative technology, the 840A V2 uses an extremely sophisticated resistor ladder and relay attenuator for volume control and the same high quality relay switches for input selection. This enables high isolation between inputs, very accurate channel balance and leaves the amplifier completely free from the distortion associated with conventional semiconductor switching and volume control.

As with all Azur products, the foundation of the Azur 840A's V2 is a bespoke chassis. This comprises an incredibly thick 7mm front panel and extruded side panels, both fashioned from aluminium, which combine with a 2mm formed steel base plate and specially designed vibration absorbing feet. The result is an ultra rigid, low resonance, acoustically dampened platform for the electronics to sit in.

Great attention has been paid to ensuring that all functions can be operated from the stunning aluminium-faced Azur Navigator remote. As well as offering full control over all the 840A V2's features and functions, this neat handset also enables track skip plus play and pause of iPods™ connected to Apple's iPod Universal Dock

Azur 840A V2 (features)

• Second generation proprietary Class XD technology
• Oversized low flux toroidal transformers
• 120 watts per channel (8 ohms)
  200 watts per channel (4 ohms)
• Completely separate pre-amp and power amp toroidal transformers and circuits make the 840A V2 effectively a pre and power amplifier combination in one chassis
• 8 audio inputs - including 1 with balanced connections
• Sophisticated resistor ladder and relay based attenuator for extremely accurate volume/balance control
• Two pairs of very high current output transistors per channel in revised configuration for improved integration with Class XD
• Twin rectifiers and separate transformer taps for dual mono operation of the left and right power amplifiers
• 232 port, IR emitter In and Control Bus In/Out for seamless integration with custom install systems
• A-BUS™ / Incognito™ Ready connections compatible with Cambridge Audio’s new Incognito multi-room keypads or other A-BUS compatible keypads allow the 840A to form the hub of a simple but highly effective 3 zone multi-room system
• Fixed level inputs allow the 840A to provide the front channel amplification when integrated with home cinema systems that use an AV processor
• Cambridge Audio proprietary CAP5™ protection system
• Nameable inputs, backlit LCD screen
• Extruded aluminium side panels and solid aluminium front panel plus an ultra rigid, acoustically dampened chassis
• Navigator style Azur remote which also controls
  o iPod™ track skip and volume functions
  o Azur CD players
  o Cambridge Audio’s Incognito keypads
  o Discrete commands for custom install use
• Available in silver or black

Azur 840A V2 specifications

• Power Output:

• Input Impedance:

• THD (unweighted):

• Frequency Response:
• Signal to Noise Ratio:
• Power amp damping factor:
• Bass:
• Treble:
• Max. Power Consumption:
• Min. Power Consumption:
• Dimensions (H x W x D):

• Weight:

120 watts per channel (8 ohms)
200 watts per channel (4 ohms)

Input 1 (balanced)20 kOhm
Inputs 2-7 20 kOhm
Tape input 20 kOhm

< 0.001% 1 kHz at 80% of rated power
< 0.01% 20 Hz - 20 kHz at 80% of rated power

10 Hz - 50 kHz +/- 1 dB

>93 dB

> 110 at 1 kHz

Max bass boost/cut +/- 10 dB at 10 Hz

Max treble boost/cut +/- 7.5 dB at 20 kHz

800W

Active (no signal) 70W, Standby 7W

115 x 430 x 385mm
(4.5 x 16.9 x 15.2”)

15.0kg (33 lbs)

Class XD^TM Technology

At the core of the 840A V2’s strength is a patent pending, Class XD (crossover displacement) technology.

This unique design 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 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 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, distorted gain transition of a Class AB amplifier.