Cambridge Audio 540c Manuel d'utilisateur télécharger pdf (Page 3)

Azur compact disc player 3

Thank you for purchasing this Cambridge Audio Azur range CD player. These

version 2 models are part of our commitment to the on-going development

of the Azur range. We hope that you will appreciate the results and enjoy

many years of listening pleasure from them.

As with previous Azur CD players, both the 540C V2.0 and 640C V2.0 make

use of a custom Cambridge Audio servo solution and transport, at the heart

of which is a VLSI (Very Large Scale Integration) circuit which dynamically

adjusts in real time the focusing, tracking and output level of the laser for the

maximum retrieval of digital information. To ensure the very best

performance there are also multiple separate power supplies for the D/A

converter circuitry, audio filters, clocks and other stages, as well as extensive

use of low impedance film capacitors.

For the Version 2 models, we have significantly upgraded and improved the

Digital to Analog stages as well as the anti-aliasing filters for even better

sound quality and have added features that allow these products to be used

in Custom Install applications. All this proprietary engineering is housed

within our low resonance, acoustically damped chassis. An Azur Navigator

remote control is also provided, giving full remote control of your CD player in

an attractive and easy to use handset.

About the 540C V2.0

The 540C V2.0 now employs a WM8740 24 bit/192 kHz capable Digital to

Analog converter from Wolfson Microelectronics. This very high quality part is

coupled to a new three pole Double Virtual Earth Balanced filter design for

very low noise and distortion. A new toroidal transformer is now fitted giving

lower noise and less waveform distortion, for quieter PSU operation. Finally,

to allow seamless integration with multi-room entertainment systems, a

Control Bus input and output have been fitted, as has an IR emitter input.

About the 640C V2.0

The 640C V2.0 now employs a pair of WM8740 24 bit/192 kHz capable

Digital to Analog converter from Wolfson Microelectronics implemented in a

dual differential configuration. As each channel has its own DAC to process

information, completely separate analog filter circuitry can be implemented.

Moreover, because of the separation of left and right audio converters, the

640C V2.0 embraces a symmetrical layout. This ensures that both left and

right channel circuitry operate identically, ensuring the 640C V2.0 delivers

fantastic sound-staging and stereo imaging properties. The dual differential

configuration also offers better signal-to-noise ratios and exceptionally low

distortion characteristics in part from the use of a new version of our

proprietary Double Virtual Earth Balanced filters.

The 640C V2.0 features a new Four Pole Dual Differential Double Virtual

Earth Balanced topology. This means the DAC for each channel features two

fully balanced outputs each of which are then summed in a 3rd order virtual

earth balanced filter stage, then a further 1st order balanced filter stage

sums the balanced outputs of the earlier filter stages. This double balanced

configuration largely rejects noise and distortion products present in the

DACs and filters and provides an unprecedented level of performance. As

with the 540C V2.0, a new toroidal transformer is now fitted giving lower

noise and less waveform distortion for quieter PSU operation. Control Bus

input/output and IR emitter input have also been fitted for Custom Install use.

Your V2.0 CD player can only be as good as the system it is connected to.

Please do not compromise on your amplifier, speakers or cabling. Naturally

we particularly recommend amplification from the Cambridge Audio Azur

range, which have been designed to the same exacting standards as our CD

players. Your dealer can also supply excellent quality Cambridge Audio

interconnects to ensure your system realises its full potential.

Now we invite you to sit back, relax and enjoy!

Matthew Bramble

Technical Director

INTRODUCTION

540C/640C V2.0 Compact disc player

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Cambridge Audio 540c Manuel d'utilisateur Page 3

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