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Upsampling digital to analogue converter
User’s manual
2
ENGLISH
Your music + our passion
DacMagic Plus
azur
2
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This guide is designed to make installing and using this product as
easy as possible. Information in this document has been carefully
checked for accuracy at the time of printing; however, Cambridge
Audio’s policy is one of continuous improvement, therefore design
and specications are subject to change without prior notice.
This document contains proprietary information protected by
copyright. All rights are reserved. No part of this manual may be
reproduced by any mechanical, electronic or other means, in any
form, without prior written permission of the manufacturer. All
trademarks and registered trademarks are the property of their
respective owners.
© Copyright Cambridge Audio Ltd 2011.
Cambridge Audio and the Cambridge Audio logo are trademarks of
Cambridge Audio.
Other brands mentioned are trademarks of their respective owners
and are used for reference purposes only.
Cambridge Audio’s policy of continuous improvement means design
and specication may change without notice.
The Bluetooth
®
word mark and logos are registered trademarks
owned by Bluetooth SIG, Inc.
apt-X
®
is a registered trademark of APT Ltd.
3
azur DacMagic Plus
ENGLISH
Contents
This package should contain the following:
1 x Azur DacMagic Plus (assembled), 1 x AC power adaptor, 4 x rubber feet, 1 x rubber base,
1 x USB ‘B-A’ type lead, 1 x user’s manual.
Introduction ...............................................................................................................................................4
Important safety instructions ................................................................................................................... 6
Limited warranty ......................................................................................................................................12
Rear panel connections .......................................................................................................................... 14
Front panel controls ................................................................................................................................17
Audio output connections .......................................................................................................................19
Digital audio input connections .............................................................................................................20
PC-USB connections ...............................................................................................................................21
Digital audio output connections ...........................................................................................................25
BT100 Bluetooth interface .....................................................................................................................26
Operating instructions ............................................................................................................................30
Filters .......................................................................................................................................................31
Technical specications ..........................................................................................................................38
Troubleshooting ....................................................................................................................................... 39
4
Introduction
Thank you for purchasing this Cambridge Audio DacMagic Plus Upsampling Digital to Analogue
Converter. We are condent that you will enjoy many years of listening pleasure from it. Like all
Cambridge Audio products, the DacMagic Plus adheres to our three core principles – stunning
performance, ease of use and incredible value
The DacMagic Plus features ATF2
TM
(2nd Adaptive Time Filtering), an up-sampling process developed
in conjunction with Anagram Technologies of Switzerland to intelligently interpolate incoming audio
data to 24-bit/384kHz through the use of a 32-bit Analog Devices DSP (Digital Signal Processor).
The ATF2 system applies sophisticated polynomial curve-tting interpolation and incorporates a
time domain model which adaptively generates the new data in the temporal domain, dramatically
reducing digital jitter.
Our latest version of this algorithm now supports noise shaped data scrambling for enhanced
linearity with 24-bit content.
As with our high-end CD players, our proprietary Dual Differential Virtual Earth Balanced lter
topology is used, congured as a low-order two pole linear-phase Bessel lter to take advantage of
the high sampling rate achieved. Two very high quality Wolfson WM8740 24-bit DAC ICs are used
in dual differential mode. Since each channel has its own DAC to process information, completely
separate and symmetrical analogue lter circuitry can be implemented. These allow both left- and
right-channel circuitry to operate identically, ensuring the DacMagic Plus delivers fantastic sound-
staging and stereo-imaging properties.
Two digital inputs are tted (both featuring S/P DIF and TOSLINK) and allow a wide range of digital
sources to be connected. In addition, a USB input enables the DacMagic Plus to be connected to a
PC and act as a very high quality DAC/Soundcard, offering genuine HiFi-quality playback from your
desktop, media PC, etc. A digital output is tted which passes through the selected digital source for
recording purposes (no up-sampling performed).
5
azur DacMagic Plus
ENGLISH
Up to 24-bit content is now supported via both the USB Audio and Digital Inputs.
With Windows PCs the DacMagic Plus can operate driverlessly (i.e. use Windows own built-in driver)
at up to 24-bit/96kHz resolution.
In addition our own Windows driver (downloadable from www.cambridge-audio.com/DacMagicPlus-
Support) allows up to 24-bit/192kHz operation and supports both kernel streaming and ASIO.
Mac PCs already support up to 24-bit/192kHz USB transfer natively.
A high quality headphone output allows personal listening and an optional digital preamp mode
allows the DacMagic Plus to be used directly into a power amp or active speakers if so desired.
Your DacMagic Plus can only be as good as the system it is connected to. Please do not compromise
on your amplier, speakers or cabling. Naturally, we particularly recommend amplication from the
Cambridge Audio range. Your dealer can also supply excellent quality Cambridge Audio interconnects
to ensure your system realises its full potential.
Thank you for taking the time to read this manual; we recommend you keep it for future reference.
Matthew Bramble
Cambridge Audio Technical Director
and the DacMagic Plus design team
6
Important safety instructions
For your own safety please read the following important safety instructions carefully before
attempting to connect this unit to the mains power supply. They will also enable you to get the best
performance from and prolong the life of the unit:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding-type plug has two blades and a third grounding
prong. The wide blade or the third prong are provided for your safety. If the provided plug does not
t into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles and the point where they exit from the apparatus.
11. Only use attachments/accessories specied by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods of time.
13. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has
been damaged in any way, such as the power-supply adaptor having been damaged, liquid has
been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain
or moisture, does not operate normally, or has been dropped.
7
azur DacMagic Plus
ENGLISH
WARNING
To reduce the risk of re or electric shock, do not expose this unit to rain or moisture.
The unit must be installed in a manner that makes disconnection of the mains adaptor from the
mains socket outlet (or appliance connector from the rear of the unit) possible. Where the mains
adaptor is used as the disconnect device, the disconnect device shall remain readily operable. Only
use the mains adaptor supplied with this unit.
Please ensure there is ample ventilation (at least 10cm clearance all round). Do not put any objects
on top of this unit. Do not situate it on a rug or other soft surface and do not obstruct any air inlets
or outlet grilles.
This unit must not be used near water or exposed to dripping or splashing water or other liquids. No
objects lled with liquid, shall be placed on the unit.
8
The lightning ash with the arrowhead symbol within an equilateral triangle is intended to alert the
user to the presence of un-insulated ‘dangerous voltage’ within the product’s enclosure that may be
of sufcient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of
important operating and maintenance instructions in the service literature relevant to this appliance.
WEEE symbol
The crossed-out wheeled bin is the European Union symbol for indicating separate
collection for electrical and electronic equipment. This product contains electrical
and electronic equipment which should be reused, recycled or recovered and should
not be disposed of with unsorted regular waste. Please return the unit or contact the
authorised dealer from whom you purchased this product for more information.
CE mark
This product complies with European Low Voltage (2006/95/EC), Electromagnetic
Compatibility (2004/108/EC) and Environmentally-friendly design of Energy-related
Products (2009/125/EC) Directives when used and installed according to this instruction manual.
For continued compliance only Cambridge Audio accessories should be used with this product and
servicing must be referred to qualied service personnel.
9
azur DacMagic Plus
ENGLISH
C-Tick mark
This product meets the Australian Communications Authority’s Radio communications
and EMC requirements.
Gost-R mark
This product meets Russian electronic safety approvals.
FCC regulations
NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED
BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE
USER AUTHORITY TO OPERATE THE EQUIPMENT.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Re-orient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
10
Ventilation
IMPORTANT The unit will become warm when in use. Do not stack multiple units on top of each
other. Do not place in an enclosed area such as a bookcase or in a cabinet without sufcient
ventilation.
Ensure that small objects do not fall through any ventilation grille. If this happens, switch off
immediately, disconnect from the mains supply and contact your dealer for advice.
Positioning
Choose the installation location carefully. Avoid placing it in direct sunlight or close to a source of
heat. No naked ame sources, such as lighted candles, should be placed on the unit. Also avoid
locations subject to vibration and excessive dust, cold or moisture. The unit can be used in a
moderate climate.
This unit must be installed on a sturdy, level surface. Do not place in a sealed area such as a
bookcase or in a cabinet. Do not place the unit on an unstable surface or shelf. The unit may fall,
causing serious injury to a child or adult as well as serious damage to the product. Do not place other
equipment on top of the unit.
Due to stray magnetic elds, turntables or CRT TVs should not be located nearby due to possible
interference.
Electronic audio components have a running in period of around a week (if used several hours per
day). This will allow the new components to settle down and the sonic properties will improve over
this time.
Power sources
The unit should be operated only from the type of power source indicated on the marking label. If
you are not sure of the type of power-supply to your home, consult your product dealer or local power
company.
To turn the unit off, switch off at the front panel. If you do not intend to use this unit for a long period
of time, unplug it from the mains socket.
38
Technical specications
D/A converters Dual Wolfson WM8740 24bit DACs
Digital lter Analog Devices ADSP21261 DSP
upsampling to 24-bit/384kHz
Analogue lter 2-Pole Dual Differential Bessel Double Virtual
Earth Balanced
Frequency response 20Hz to 20kHz (±0.1dB)*
THD @ 1kHz 0dBFs <0.001% 24-bit
THD @ 1kHz -10dBFs <0.001%
THD @ 20kHz 0dBFs <0.002%
S/N ratio -112dBr
Total correlated jitter <130pS
Crosstalk @ 1kHz < -130dB
Crosstalk @ 20kHz < -112dB
Output impedance <50ohms
Max output level (unbalanced) 2.1V rms
Max output level (balanced) 4.2V rms (2.1V per phase)
Digital input word widths supported 16-24bit
Digital input sampling frequencies supported 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz,
176.4kHz**, 192kHz
Audio output upsampling Fixed 24-bit/384kHz
Max power consumption 12W
Dimensions (H x W x D) 52 x 215 x 191mm (2.0 x 8.6 x 7.6”)
Weight 1.2kg/2.6lbs
* Steep lter disabled
** Digital 1 & 2 Inputs only
38

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