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Upsampling digital to analogue converter
User's manual
DacMagic Plus
Your music + our passion

Summary of Contents

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    Upsampling digital to analogue converter User’s manual azur DacMagic Plus Your music + our passion...

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    © 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.

  • Page 3: Table Of Contents

    Technical specifications ..........................38 Troubleshooting ............................39 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.

  • Page 4: Introduction

    Thank you for purchasing this Cambridge Audio DacMagic Plus Upsampling Digital to Analogue Converter. We are confident 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...

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    Your DacMagic Plus 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 range. Your dealer can also supply excellent quality Cambridge Audio interconnects to ensure your system realises its full potential.

  • Page 6: Important Safety Instructions

    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.

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    azur DacMagic Plus WARNING – To reduce the risk of fire 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.

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    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 qualified service personnel.

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    azur DacMagic Plus 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.

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    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 sufficient 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.

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    azur DacMagic Plus Overloading Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock. Overloaded AC outlets, extension cords, frayed power cords, damaged or cracked wire insulation and broken plugs are dangerous. They may result in a shock or fire hazard. Be sure to insert each power cord securely.

  • Page 12: Limited Warranty

    Cambridge Audio warrants this product to be free from defects in materials and workmanship (subject to the terms set forth below). Cambridge Audio will repair or replace (at Cambridge Audio’s option) this product or any defective parts in this product. Warranty periods may vary from country to country.

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    azur DacMagic Plus Some countries and US states do not allow the exclusion or limitation of incidental or consequential damages or implied warranties so the above exclusions may not apply to you. This Warranty gives you specific legal rights, and you may have other statutory rights, which vary from state to state or country to country.

  • Page 14: Rear Panel Connections

    Rear panel connections DacMagic Plus Upsampling DAC Designed and engineered in London, England Ground/Lift Ext. Device Switch Left Digital Outputs Digital Input 1 Digital Input 2 Ground Lift USB Audio In +12V DC 2A Right Use supplied Unbalanced S/P DIF Toslink S/P DIF Toslink...

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    (not one designed for normal audio use). TOSLINK optical – use a high quality TOSLINK fibre-optic interconnect cable designed specifically for audio use. To achieve the best results we always recommend using high quality Cambridge Audio leads, which are guaranteed for life.

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    We advise using the Grounded setting unless audible hum is experienced. Ext. device Allows connectivity of USB audio enabled Cambridge Audio accessories, such as the BT100 Bluetooth adaptor. DC 12V 1.5A power adaptor socket Once you have completed all connections, plug the supplied power adaptor into the DacMagic Plus.

  • Page 17: Front Panel Controls

    azur DacMagic Plus Front panel controls Power on/off Switches the unit between on and off. Source Press to select between USB, External (Ext.) or Digital Inputs 1 and 2. The corresponding LED will light up to show which source has been selected. Digital volume control When headphones are connected, the headphone volume can be adjusted using the volume knob.

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    Filter/Phase select Momentarily press to select between three different filter modes: linear phase, minimum phase or steep, see later section for details. The corresponding LED will light up to show which filter has been selected. Phase Press and hold the Filter/Phase select button for approximately two seconds to select normal or inverted phase output.

  • Page 19: Audio Output Connections

    azur DacMagic Plus Audio output connections Note: Do not turn on the unit until all connections have been made. DacMagic Plus AC Adaptor Amplifier Unbalanced Input Balanced Input Use either the unbalanced (RCA/Phono) or balanced (XLR) outputs of the DacMagic Plus. The XLR output is slightly better in quality as it can reject interference and noise in the cable connection and is the preferred option if your amplifier features balanced XLR inputs.

  • Page 20: Digital Audio Input Connections

    Digital audio input connections Note: Do not turn on the unit until all connections have been made. DacMagic Plus AC Adaptor CD/DVD player Digital Outputs Connect your digital source to Digital Input 1 or 2. Either S/P DIF co-axial or TOSLINK optical types can be used, each being of equal quality.

  • Page 21: Pc-usb Connections

    azur DacMagic Plus PC-USB connections Note: Do not turn on the unit until all connections have been made. DacMagic Plus AC Adaptor USB ‘B–A’ type lead Note: Always use a certified cable for USB Audio, preferably one that displays an official mark. For USB Audio 2.0 the cable should be the ‘Hi-Speed USB’...

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    Advanced USB audio The DacMagic Plus is both USB 2.0 (Hi-Speed) and USB 1.1 (Full-speed) USB port compatible. It will also work with the new USB 3.0 ports where the PC will simply treat the DacMagic Plus as if it were a USB 2.0 or 1.1 device.

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    Windows XP, Vista or 7 Audio 1.0 driver (no need to load any new driver) and accept audio up to 24-bit/96kHz. With the DacMagic Plus switched to USB Audio 2.0 the DacMagic Plus needs the Cambridge Audio USB Audio 2.0 Driver to be loaded and can then accept up to 24-bit/192kHz (and support ASIO and WASAPI Exclusive if required).

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    This is a fast moving area so we would encourage you to check the web for the latest media players to support these more audiophile playback options. To use ASIO you will need the Cambridge Audio Sound Driver installed and the DacMagic Plus switched to USB Audio 2.0.

  • Page 25: Digital Audio Output Connections

    azur DacMagic Plus Digital audio output connections Note: Do not turn on the unit until all connections have been made. DacMagic Plus AC Adaptor Digital recorder Digital Inputs If it is desired to loop out the currently selected digital audio for recording on a suitable device (MD, CD-R, etc.), you can connect either an S/P DIF co-axial or TOSLINK optical cable to the digital outputs as shown, each type being of equal quality.

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    Optional BT100 Bluetooth adaptor (not supplied) When connected to your Dacmagic Plus this adaptor allows the DacMagic Plus to receive BluetoothAudio (known as Bluetooth Advanced Audio Distribution Profile or A2DP). Contact your dealer for details. The BT100 supports Bluetooth A2DP using either the original SBC encoded form or the latest higher quality apt-X encoded form.

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    azur DacMagic Plus BT100 controls and connections A. Pairing button/Status LED Button performs pairing and related functionality. Integrated LED indicates BT100 status. B. USB plug Streams high quality USB audio into your DacMagic Plus Ext. socket. C. Extension Cable Allows the BT100 to be positioned for accessibility or optimal wireless reception.

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    10m of the BT100. Normally on your source you will need to select Bluetooth Pairing and then the BT100 should appear as ‘Cambridge Audio BT100’ in a list of locally found Bluetooth devices. Select that item in the list to finish pairing.

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    azur DacMagic Plus D. On successful pairing, the BT100s LED goes off for a second or two, then triple flashes quickly. The LED then goes off and only lights up in the future when you are playing audio via Bluetooth. E.

  • Page 30: Operating Instructions

    Operating instructions The DacMagic Plus can be sited in two different positions, as shown in the accompanying diagram. It can be placed horizontally by fitting the four small individual feet, or vertically by using the large rubber ‘foot’. Power on the DacMagic Plus using the On/Off button on the front panel. After 4-5 seconds, the unit will unmute and the current Source and Filter type will be shown by the front panel LEDs.

  • Page 31: Filters

    azur DacMagic Plus Filters The DacMagic Plus DSP has three different Filter functions: Linear Phase, Minimum Phase and Steep. All three filters are highly sophisticated audiophile topologies, optimised specifically for audio playback. In our opinion, these filters offer excellent sound quality but differ subtly in optimisation, hence we’ve made all three available to you.

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    The Linear Phase filter is a highly regarded audio filter offering low ripple in both the pass and stop bands, and what is known as constant group delay. Constant group delay means that audio signals of all frequencies are always delayed by the same amount when passing through the filter. All audio is therefore fully time-coherent at the output.

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    azur DacMagic Plus Minimum Phase Filter Frequency response -100 -120 -140 -160 -180 -200 frequency/FS (input sampling rate)

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    The Minimum Phase filter is another highly regarded audio filter that offers even lower ripple in the pass and stop bands. Unlike the Linear Phase filter, group delay is not constant so some time- coherence is lost; however, phase shift is low and the particular benefit with this filter is that the impulse response exhibits no pre-ringing.

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    azur DacMagic Plus Steep Filter Frequency response Steep filter Linear phase filter -100 -120 -140 -160 -180 -200 frequency/FS (input sampling rate)

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    Our Steep filter is a linear phase filter that has been optimised for stop band attenuation of close-in aliasing images. Here we have traded a little attenuation of the very highest frequency response (-2dB at 20kHz) and a little more pre- and post-ringing for a very steep attenuation just outside the pass band.

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    azur DacMagic Plus The following table shows the filter stop band attenuation: Linear Phase Minimum Phase Steep Roll-off at 20kHz -0.1dB -0.1dB -2dB Roll-off at 22kHz -10dB -10dB -82dB Ultimate roll-off 140dB 140dB 140dB We encourage you to experiment with the filters to determine which sound best to your ears and using your source equipment/programme material.

  • Page 38: Technical Specifications

    Technical specifications D/A converters Dual Wolfson WM8740 24bit DACs Digital filter Analog Devices ADSP21261 DSP upsampling to 24-bit/384kHz Analogue filter 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...

  • Page 39: Troubleshooting

    azur DacMagic Plus Troubleshooting There is no power Ensure the supplied AC adaptor is connected securely to the PSU socket on the rear panel. Ensure that the correct mains transformer is being used and that it complies with the local electrical supply.

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    Cambridge Audio is a brand of Audio Partnership Plc Registered Office: Gallery Court, Hankey Place London SE1 4BB, United Kingdom Registered in England No. 2953313 © 2011 Cambridge Audio Ltd...

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