B.M.C. Pure Dac Owner'S Manual Download Page 3

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Table of Content

Introduction, packing list

Front Panel Functions

Rear Panel Functions, B.M.C. Link

Remote Control

USB Operation

USB Connection

Headphone Amplifier

Balanced Headphone Drive

Connection Diagrams

Troubleshooting, Maintainance, Service

Important Safety Information

General Safety Precautions

CE / FCC declaration, Recycling

Technical Specifications

6-7

11-14

Summary of Contents for Pure Dac

Page 1: ...Balanced Music Concept Balanced Music Concept www bmc audio com www bmc audio com Owner s Manual Owner s Manual ...

Page 2: ...B M C Link Section Digital Input Section Mute Headph Find a detailed description inside of this manual 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use the unit near water or other liquids 6 Clean only with a dry cloth 7 Do not block any ventilation openings Install in accordance of the manufacturer s instructions 8 Do not install the u...

Page 3: ...nk Remote Control USB Operation USB Connection Headphone Amplifier Balanced Headphone Drive Connection Diagrams Troubleshooting Maintainance Service Important Safety Information General Safety Precautions CE FCC declaration Recycling Technical Specifications 3 4 5 6 6 7 8 9 10 11 14 15 16 17 18 19 ...

Page 4: ...music sources The PureDAC s asynchronous USB input is configured for the USB 2 0 audio standard and accepts and plays signals up to 32 bit 384 kHz which can optimally resolve all popular audiophile grade digital formats such as FLAC WAV and AIFF as well as lower resolution Mp3 files Many software players might limit the maximum resolution to 24 bit 192 kHz The integral preamplifier is fully balanc...

Page 5: ...volume position is displayed in Toggles the line output mute on and off For PCM signals the detected playback sampling frequency is displayed A 176kHz 192kHz 352kHz or 384kHz playback is indicating HR which stands for High Resolution Note high resolution playback is available using a USB connection only For any DSD playback the DSD indicator lights up Note DSD is available using a USB connection o...

Page 6: ... must be installed Linux and MacOS work without any additional driver Coaxial digital input for 75 Ω RCAinterconnect 44 1kHz 48kHz and 96kHz are supported Analog RCA output for unbalanced connection of an amplifier or active speaker Balanced analog XLR output for connecting an amplifier or active speaker The PureDAC offers a further sonic improvement when used together with a B M C amplifier Conne...

Page 7: ...options As a general rule all signals from 16bit 44 1kHz up to 24bit 192kHz will work well Ü Most player software displays the type of file and its resolution If the file information shows a different display than the PureDAC your computer is re sampling the signal Ü The term Bit Perfect transmission of the audio data to the DAC was coined to explain than no manipulation at all is being applied to...

Page 8: ...ayer Microsoft s own WASAPI interface works with PureDAC but ASIO is recommended for best results As available software changes frequently please consult our on line information at www bmc audio com All modern Linux distributions support the USB 2 0 audio protocol out of the box There is no need to include Linux software on the enclosed disk since the distributions offer and maintain any recommend...

Page 9: ...ich are delivering a stable and clean signal to the DAC Depending on the connected computer the USB link may fail when hot plugging or restarting Without a hardware link the external USB sound device does not exist and consequently can not be used If you experience this difficulty remove the USB cable power off the PureDAC re plug the cable and power on the DAC again The TUSB driver control window...

Page 10: ...n the best case A clean signal voltage from the CI IV converter does not drive a headphone directly and thus a driver with exceptional control ability has to be utilized B M C s Load Effect Free circuit has a unique structure The voltage source controlling the headphone with a very low impedance generates no distortion since it does not have to deliver any current to the headphone thus the output ...

Page 11: ... the signal voltage change within the same time which means double signal speed Ü One sided even distortions are effectively cancelled by the nature of the circuit s architecture Ü Power supply noise contaminating both balanced channels in the same way cancels itself Any headphone with 4 separate wires 2 x left 2 x right can be configured for balanced drive One simple indicator is a cable which sp...

Page 12: ...Audio Germany SPEAKER LEFT 11 Connection Diagrams Connecting PureDAC to a B M C Amplifier For connecting the PureDAC to a B M C amplifier like the PureAMP it is recommended using the B M C Link for the best results Ü Connect the analog XLR output to the amplifier s XLR inputs Ü Then connect an optical Toslink cable from the PureDAC s Out Link to the In connector on the B M C amplifier Ü Activate t...

Page 13: ... steps Ü Connect the analog XLR output to the amplifier s XLR inputs Ü If the amplifier has only RCA inputs use the PureDAC s RCA outputs for connection to the amplifier input Ü In case of connecting an active subwoofer you can use the RCA output in parallel to the XLR output Ü Deactivate the B M C Link by setting the switch on the rear panel to Off This is the standard setting and the PureDAC wil...

Page 14: ...eaker like the PureVOX A we recommend that the B M C Link be used for best quality sound Ü Connect the analog XLR output to the speaker s XLR inputs Ü Then connect an optical Toslink cable from the B M C Link to each speaker s B M C Link input Ü Activate the B M C Link by setting the switch on the rear panel to On Do not use this setting for other configurations Connection Diagrams Connecting Pure...

Page 15: ...adphone must be wired properly and should not use any adaptors Connect a Headphone for balanced mode operation to this plug This is a very low impedance output and the headphones should be wired as follows 1 Left channel non inverted 2 Left channel inverted 3 Right channel non inverted 4 Right channel inverted a balanced headphone to 4 Pin Balanced XLR Headphone Terminal Connection Diagrams ...

Page 16: ...decreases change the batteries of the remote control to new ones of type AA Take care to set the B M C link switch on the rear according to your actual use The PureDAC requires no user maintenance Clean the unit with a dry micro fiber cloth only Take special care not to scratch the acrylic window In case you have to contact the B M C Audio Service Center please prepare the following information Mo...

Page 17: ...ny user serviceable parts Any burnt fuses inside this unit should be replaced by qualified service personnel only Please leave service and maintenance to qualified service personnel Reduce the risk of electric shock do not remove the cover or rear panel It does not contain any user serviceable parts Refer servicing to qualified service personnel WARNING TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOS...

Page 18: ... s casing 11 Only use attachments accessories specified by the manufacturer 12 Only use the unit with a cart stand tripod bracket or table specified by the manufacturer or sold with the unit If using a cart exercise caution when moving the cart unit combination to avoid injury from it tipping over 13 Unplug the unit during lightning storms or when leaving it unused for extended periods of time 14 ...

Page 19: ...ed 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 interference to radio communications There is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful in...

Page 20: ...e XLR 22 Ω Output Impedance Line RCA 120 Ω Output Impedance HD Balanced Less than 1 Ω Output Impedance HD Standard About 100 Ω Power HD Bal 32 Ω 1 2W limited by 200mA current limiter Power HD Bal 100 Ω 1 7W 13Vrms Power HD Bal 600 Ω 0 28W 13Vrms Power Consumption 24 W Dimensions W 365 H 103 D 328 mm 14 37 x 4 06 x 12 91 Weight 5 5 kg 12 13lb Note Technical specifications are subject of change with...

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