|
The 740C is the
latest in Cambridge Audio’s Azur series of CD players. Using the
upsampling technology present in the top-of-the-range 840C
barnstormer, now married to dual Wolfson WM8740 24-bit DACs with a
newly developed Bessel implementation of our proprietary virtual
earth balanced filtering, the 740C is set to rejuvenate the mid
price sector. The 740C incorporates the same 32-bit DSP as the 840C
and upsamples to full 24-bit 384 kHz.
 The
740C is the first CD player at the price to provide upsampling
technology, a benefit normally bestowed upon products costing up to
six times as much. Key to the abilities of the 740C is ATF™ (Adaptive
Time Filtering) an upsampling process developed in conjunction with
Anagram Technologies of Switzerland. This system intelligently
interpolates 16-bit/44.1 kHz CD (or other) audio data to 24-bit/384
kHz through the use of a 32-bit Analog Devices Black Fin DSP
(Digital Signal Processor) for the very best sound quality. The ATF
system applies sophisticated polynomial curve fitting interpolation
and incorporates a time domain model which allows data buffering and
re-clocking. This almost completely eradicates digital jitter.
The 740C uses an
enhanced version of our proprietary Dual Differential Virtual Earth
Balanced filter topology. As the upsampled audio data rate is so
high, aliasing artefacts are moved well above audible frequencies,
this in turn means we can use a new low order two pole linear-phase
Bessel version of the topology for constant group delay and minimal
phase shift in the audio band.
Two high quality
Wolfson WM8740 24-bit DACs (Digital to Analogue Converters) are used
in dual differential mode. As each channel has its own DAC to
process information, completely separate and symmetrical analog
filter circuitry can be implemented. These allow both left and right
channel circuitry to operate identically, ensuring the 740C delivers
fantastic sound-staging and stereo imaging properties.
The unit is
equipped with two digital inputs allowing other digital sources to
be brought into the 740C and upsampled so that the 740C works as a
prodigiously high quality DAC.
A digital output
is also fitted which can even output upsampled data at various rates
and word widths, independent from the main audio output, which is
always set at 24/384kHz for best sound quality.
In addition to
these audiophile features Control Bus Input/Output and IR emitter
inputs are provided to make it easy to integrate this unit into
custom installations if desired.
All this
proprietary engineering is housed within our low resonance,
acoustically dampened chassis. An Azur navigator style remote is
also provided, giving full control of your CD player and Azur
amplifiers in an attractive and easy to use handset. As an
additional facet, all Cambridge Audio remotes feature iPod™ C ommand
– which means that basic iPod controls such as volume and track
select can be controlled from the comfort of the user’s armchair.
This boon requires the use of an Apple or other universal dock.
|
Pulsar en la foto para
ampliar
