H I G H D E F I N I T I O N® Reference DAC Thank you for choosing the Reference DAC to be a part of your high performance music listening system. Since 1970, Audio Research has been creating some of the world’s finest audio equipment. Each piece is handcrafted in Minnesota, and has been designed to provide many years of listening enjoyment. We understand you are eager to begin listening; however, please take a few minutes to read through this guide for useful information concerning the operation of your new DAC. Once installed, please allow an appropriate breakin period to fully appreciate the benefits this amplifier will provide to your system. Thank You. After reading the user guide, if you have any further questions regarding your DAC, contact your dealer or Audio Research customer service - they will be happy to help you make the most of your new component. Happy Listening! 3 Contents Warnings Illustrations and Diagrams Front and Rear Panel Menu Tree Icons Installation Before operating the Reference DAC In Your System A note about Vacuum Tubes Connections Input Connectors Output Connectors Control Connectors 5 6 7 10 11 12 12 14 14 13 14 13 15 13 16 19 21 Maintenance Vacuum Tubes Servicing Cleaning Disposal and Recycling Guidelines About Fuse Replacement 32 22 32 22 32 29 32 32 Warranty 33 Commpatibility and Connectivity 34 Specifications 35 4 Operation Start-Up Shut-Down Break-in Front Panel Controls Settings Menu Input Operation Troubleshooting Guide Software Installation Windows PC Software Installation Note to Mac OS Users Removal of Previous Driver Versions Warnings To prevent fire, or shock hazard, do not expose your Reference DAC to rain or moisture. If the unit is to be operated in an enclosure such as an equipment rack, make certain that adequate airflow above and to each side of the unit is provided, and ensure that the ventilation fans on the back panel are not obstructed. Do not place objects containing water on top of this unit. This unit contains voltages which can cause The appliance coupler at the rear of this unit serious injury or death. Do not operate with must be accessible for emergency power cover removed. Refer servicing to your disconnect. authorized Audio Research dealer or other qualified personnel. This unit is RoHS compliant. The detachable power cord on your A note about packaging... Reference DAC is equipped with a heavy Save all packaging in a dry place away from gauge, 3-conductor cable and a standard fire hazard. Your Reference DAC compact three-prong grounding plug. For absolute disc player is a precision electronic protection, do not defeat the ground power instrument and should be properly plug. This provides power line grounding cartoned any time shipment is made. You of the Reference DAC chassis to provide may not have occasion to return your absolute protection from electrical shock. unit to the factory for service, but if that should prove necessary, or other occasion For continued protection against fire hazard, requiring shipment occurs, the original replace the fuse only with the same type packaging will protect your Reference DAC and rating as specified at the fuse holder. from unnecessary damage or delay. 5 INPUT VOLUME USB MEM POWER DIGITAL MEDIA BRIDGE < > SELECT EXIT MUTE REFERENCE DAC HIGH DEFINITION REFERENCE DAC DIGITAL MEDIA BRIDGE PLYMOUTH, MINNESOTA MADE IN U.S.A. WiFi RS-232 IR INPUT ANTENNA USB2.0HS RCA BNC AES/EBU TOS RIGHT CHANNEL ETHERNET LEFT CHANNEL ANALOG OUTPUTS DIGITAL INPUTS iPod +12V REMOTE TRIGGER OUT CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE FUSE ONLY WITH SAME TYPE AND RATING WARNING TO PREVENT FIRE AND SHOCK HAZARD, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE. UNIT MUST BE OPERATED IN A HORIZONTAL POSITION. VOLTS -DO NOT OPERATE WITH COVERS REMOVEDUNIT CONTAINS VOLTAGES WHICH MAY BE HAZARDOUS. SERIALt REFERENCE DAC FILTER MONO SAMPLE INVERT INPUT HOURS BAL L BAL R SHUFFLE REPEAT VOL DN MUTE VOL UP PAUSE PLAY H I G H D E F I N I T I O N® 6 SLO-BLO T1A (230V) POWER EXIT 1.5A FUSE 140W MAX 50/60 HZ 7 8 9 Icons Main Menu HS MEM Status Bar AES/EBU Balance Left BNC Balance Right Internet Radio Sharp Filter iPod Soft Filter Media Server Invert RCA Mute Settings Mono Toslink Pause USB 2.0 HS Play USB Stick Repeat All 1 Functional Loading Repeat One Shuffle Music File/Album Selected Song/Station 10 Installation REAR V4 V2 V3 V1 V5 V6 TUBE LOCATIONS TOP VIEW FRONT Installation of Vacuum Tubes Do not attempt to install or remove any This unit has been shipped with the vacuum vacuum tubes unless this unit is turned tubes in a protective foam block inside off and disconnected from the A.C. power a separate box. Using a phillips-head outlet. Unit should be connected to the screwdriver to loosen the fastening screws, A.C. outlet and turned on only after all remove the top cover and set aside. vacuum tubes have been installed and After removing the top cover open the box appropriate panels have been replaced of vacuum tubes and see the accompanying and fastened. See owner’s manual for illustrated sheet for instructions on installation instructions. installing the tubes for your Reference Before replacing vacuum tubes, turn off unit, DAC in their proper locations in the power disconnect from A.C. outlet and allow supply and audio section. Note that the installed tubes to cool before attempting numbers written on each tube correspond to remove them. Hot tubes may cause to a ‘V’ number printed on the circuit board burns or other injury if not allowed to cool next to each tube socket. Insert each tube before removal. firmly, carefully aligning the tube pins with When removing or installing tubes, do the corresponding socket holes. not touch tube socket contacts or other components as the circuit may retain sufficient levels of voltage and current to cause injury or death.Contact your dealer or Audio Research Customer Service (763577-9700) if you have any questions about installing or replacing vacuum tubes in this unit. 11 Installation In your system To insure normal component life and safe operation this unit must be operated only in an upright position. Adequate airflow and proper cooling can occur only if there is no restriction above and behind the unit and on either side. The ‘ambient’ operating temperature should never exceed 120° F or 49° C. Improper installation will cause premature tube failure and will affect your warranty, as well as the service life of the unit. It is normal for a vacuum tube component to run quite warm, and if used for prolonged periods, hot to the touch. All components within are, however, operated at safe, conservative levels and will not be improperly affected thereby, providing the requirements outlined above are adhered to. The special non-marring elastomer feet provide adequate spacing and stability only on a smooth, hard surface, and also assist to isolate the DAC from spurious vibrations. For upright stability and best performance, never operate the unit while it is sitting on a soft surface such as a thick rug or carpet. A Note about Vacuum Tubes The vacuum tubes in your Reference DAC have been burned in, tested and electrically matched to provide the best performance and reliability of your DAC. That said, vacuum tubes must be replaced from time to time. The 6H30 tubes in the Reference DAC should have an expected life of approximately 4,000 hours, while the 6550WE tube in the power supply should have a life expectancy of approximately 2,000 hours. These life expectancies are only approximate. Due to its weight, this DAC must be supported on a surface specifically rated for such a load. Check with the manufacturer of your support system to be sure it is rated to handle this weight. If the unit is to be operated in an enclosure such as an equipment rack, make certain that adequate airflow above and to each side of the unit is provided. 12 Connections Input Connectors The Reference DAC provides seven connections on the rear panel (USB 2.0HS, RCA, BNC, AES/EBU, Toslink, Ethernet and iPod) and one connection on the front panel (USB Mem). iPod: Connect the USB end of a cable with the Apple 30-pin connector for use with an iPod, iPad or iPhone. NOTE: This connection is designed for use with an iPod, iPad, or iPhone only. USB Mem: Insert a USB memory stick into the front slot on the Reference DAC to access music files loaded on the memory stick. NOTE: This connection is designed for use only with a memory stick or compatible mass storage device. Digital Inputs USB 2.0HS: Connect a USB cable from your computer to the Reference DAC. RCA (SPDIF): Connect an RCA cable from a disc transport or other digital device equipped with an RCA digital output connector. Output Connectors One pair of balanced and single-ended main outputs are provided. BNC (SPDIF): Connect a BNC cable from a disc transport or other digital device equipped with a BNC digital output connector. Control Connectors 12V In/Out Remote Power Jacks: The +12V DC input/output jacks provide the ability to remotely turn on and off other linked components such as power amplifiers having similar capabilities. AES/EBU: Connect an AES/EBU cable from a disc transport or other digital device equipped with an AES/EBU digital output connector. RS-232 Connection: The RS-232 connection allows for control via systems such as Crestron or other automation systems. Toslink: Connect a Toslink optical cable from a digital device equipped with a Toslink output. IR Input: The IR input allows a wired IR connection to the Reference DAC. This connection will defeat the front panel IR receiver. Ethernet: Connect an RJ-45 cable to a home network or other compatible system for use with the Media Server interface and to supply access to the internet for Internet Radio service. 13 Operation Start Up 1. Secure all rear-panel connections between Reference DAC, preamplifier or power amplifier(s), and input sources. 2. Plug three-prong power cord from rear of chassis into grounded A.C. wall outlet. The Power switch defaults to ’off’ when the unit is plugged into a power receptacle. 3. Press power switch (either remote or front panel). The display will remain black for approximately 8 seconds, after which the Reference DAC splash screen will appear. Once the splash screen is gone, the main menu page is displayed, and a countdown timer will show the seconds until the unit is ready for operation. After countdown, the unit will be in Mute. 4. Select input source, unmute and select volume level. Shut Down 1. Activate ‘Mute’ function. 2. Set Volume level to 0. 3. Turn off power amplifier(s) and preamplifier. 4. Press Power switch to ‘off’. Turn off input sources. Break-in All quality stereo equipment benefits from a break-in period; during this time, the various components, wiring and solder connections change as electrical signals pass through them. While your Reference DAC will sound fantastic out of the box, it will only improve with continued use. Note The Reference DAC should be the first component turned on in your system (along with any additional sources). If the Reference DAC is turned on after the amplifier, and the preamplifier is also powered, it will amplify any extraneous turn-on noises the preamplifier or other source components might generate, which could potentially damage the loudspeakers. Good operating practice dictates that the amplifier should be turned on last, and turned off first in an audio system. Note The Reference DAC is equipped with a variable output and volume control. If you are using this unit in conjunction with a preamplifier, please set the volume to a static location and use the volume control on the preamplifier. A volume setting of 66 is equivalent to Line Out on most components. 14 Operation Front Panel Rotary Controls Mute: When activated, electrically mutes The Reference DAC has two microprocessorall output of the DAC; indicated by ‘Mute’ driven rotary controls. in display window. This control should be The rotary control on the left adjusts Volume activated before switching inputs, changing (output level) up or down for both L and R connections or shutting down your audio channels. Volume control is also selectable system to help protect your amplifier and via Vol UP and Vol DN buttons on the speakers from unexpected signal pulses. remote control. Volume adjustment is When deactivated, ‘Mute’ disappears indicated in the display window by numeric from the display window allowing normal digits on 0–103 scale. operation. Function also on remote Do not turn volume up beyond normal control. listening levels when ‘Mute’ is engaged to The Reference DAC also has automatic avoid unexpected or possibly damaging muting to help protects system sound levels. components during A.C. power The rotary control (on the right) selects any interruptions or low line voltage. When of the inputs on the Reference DAC, and is sensing these conditions, the preamp also a navigator through the settings and automatically goes into ‘Mute’ and disables front panel interface. all outputs. The Reference DAC will reset itself and begin the initial startup sequence Front Panel and Remote Control Buttons as described under ‘Power On/Off’. Power On/Off: Supplies power from A.C. Note that automatic muting is only designed wall outlet to DAC; indicated by active to protect against power line interruptions display window. or severe voltage drop. It will not mute in After pressing the Power button to turn the event of subsonic transmissions from on unit, the display will remain black for a faulty input source, amplifier failure or approximately 8 seconds, after which the speaker malfunction. Reference DAC splash screen will appear. Once the splash screen is gone, the main Select: Pressing the Select button engages menu page is displayed, and a countdown the highlighted input on the screen, or timer will show the seconds until the unit advances the Reference DAC to the next is ready for operation. After countdown, screen when using the settings menus. It the unit will be in Mute. also is used to select folders and tracks when using an i-device or media server, Left/Right Arrows (< >): Used during or stations for the internet radio tuner. menu navigation. The Right arrow (>) will Function also on remote control (center advance the Reference DAC to the next button of navigation pad). screen or selection, and the Left arrow (<) will go back one screen or menu selection. Exit: Toggles the Reference DAC from the Function also on remote control (Left and current screen to the main menu/input Right arrows on navigation pad). selection screen. 15 Operation Volume Up/Down: Using rotary control on front panel or VOL UP/VOL DN buttons on remote, increases/decreases overall volume level of both channels equally for whichever input has been selected. Caution: do not turn up volume beyond normal listening levels when “Mute” is engaged to avoid unexpected or possibly damaging sound levels. It is a good idea to reduce volume whenever changing program sources, even when muted. Invert: Inverts absolute phase of the output signal. Input: Toggles through the different digital inputs. Repeat: Toggles the Reference DAC between Repeat All and Repeat One track and no repeat. Shuffle: Toggles the Shuffle feature on and off. Shuffle instructs the Reference DAC to randomly select tracks from a device or folder. Input: Moves the selection bar up or down on the display. Turn the Input knob to the left or right to highlight an input, and then press the ‘Select’ button to choose that input. Also use the Input knob to move the selection bar to the desired function or folder when navigating the settings menu or music folders. Function also on remote (Up and Down arrows on navigation pad). Note Repeat and Shuffle only function with the following inputs: Media Server, Ipod Dock, USB Input. Hours: When pressed, displays number of operating hours vacuum tubes have been in service. Remote Control only Functions Filter: Selects between Sharp or Soft digital filter algorithms. Warning After replacing tubes, this function should be reset to ‘0’ only by a qualified technician. Hours display can be reset to ‘0’ by pressing black button labeled located on upper right corner of circuit board directly behind display window. The unit must be “On” to reset function – the service technician must be careful to avoid any contact with other circuit components during reset operation. Contact Audio Research customer service (763-577-9700) for information regarding this procedure. Mono: Sums L and R input for mono output from any source selected. Sample: Selects between the native sample rate of the incoming signal or integerbased upsampling (Ethernet client board, Media server, iPod, internet radio, USB stick, max is 88.2 and 96kHz, SPDIF inputs, max is 176.4 and 192kHz, and USB2.0HS, upsampling is selected in the computer; not done in hardware). 16 Operation Settings Menu Once the unit has been powered on and completes the initialization sequence, the main menu will be displayed. Navigate to the bottom of the input list (using the ‘Input’ knob on the front panel, or the down arrow on the remote) and select ‘Settings’. There are four options for setup and functional aspects of the Reference DAC: Network, User Interface, Playback, and General. If a password is required, the following screen will allow you to enter it (use the up and down arrows to scroll through the characters, and the right arrow to advance to the next space. Pressing the center navigation button after completing the password will make the connection). WPS offers both PIN and push button support. Network Info This section will explain how the Reference DAC is connected and how it appears within your network. Network Establishing a Wireless or Ethernet connection Network Setup Two options will be displayed: Wired or Wireless. The current selection will have a check mark next to it; if you choose the unchecked option, the unit will restart and cycle through the initialization sequence. For a wired setup, once you have selected wired, the following screen will let you select Automatic (DHPC) or Static IP Address. The preferred setup is to choose Automatic (DHPC); on the following screen select Proxy off and then confirm by pressing the center navigation button. Use Static IP Address if you need the Reference DAC to have a constant fixed IP address on your network. For a wireless setup, once you have selected wireless, the following screen will give you the option for Scan or WPS (Wi-Fi Protected Setup). Scan will reveal any existing wireless networks accessible by the Reference DAC. To sign in to any network on this list, scroll to it and select it. Default UPnP Server Use this feature to always direct the Reference DAC to a specific location on your network. If you specify a default server, the Reference DAC will immediately go to that location when the Media Server input is selected. Renderer Name This section allows the Reference DAC to be given a renderer name as displayed on a network. 17 Operation User Interface Edit and change display features General Functional and Software information Edit names Several inputs on the Reference DAC can be programmed to have customized names: USB 2.0HS, AES/EBU, BNC, RCA, and TOS. To change an input name, select the name you want to change and use the navigation pad to enter the new name (up and down arrows select characters, right and left arrows move the cursor back and forth). Once you have entered in the new name, press the center navigation button. Reset Settings Reset your Reference DAC to the original factory settings. Software Update Check for any software updates for your Reference DAC (internet connection required). Info Displays current version of software loaded on the Reference DAC. Display Timeout The display on the Reference DAC is set Legal by default to always remain illuminated Website to view all legal documents related (timeout is ‘Off’). This function allows to the various licenses utilized by the various timeouts to be chosen, from Reference DAC. 10 seconds to one hour. To change the timeout, simply select the appropriate time out and press the center navigation button. The currently selected timeout will have a check next to it. Playback Control shuffle and repeat Two options, Repeat and Shuffle, are in the Playback section. Select Repeat to choose to repeat one, all or no tracks. Select Shuffle to choose to shuffle tracks or albums or no shuffle. The currently selected item will have a check next to it. Note Repeat and Shuffle are also both directly accessible from the remote control. 18 Operation Input Operation Media Server 1. Ensure you have an Ethernet cable connected to the Reference DAC, or you have established a wireless connection. 2. From the Main Menu, use the navigation buttons on the remote (or the Input knob on the front panel) to scroll to Media Server. Press the center navigation button, or ‘Select’ on the front panel. 3. Navigate through the menu structure to choose the desired folder(s), selecting each folder of your choice. Once you have reached the song level of the menu, you will see notes appear next to each song title. 4. Select the song of your choice. The Reference DAC will begin to play music from this point (assuming there are other songs following the one you have chosen, the Reference DAC will continue until the final song). 5. For further features such as repeat and shuffle, please see page 12. 1. Navigate through the menu structure to choose the desired folder(s), selecting each folder of your choice. Once you have reached the song level of the menu, you will see notes appear next to each song title. 2. Select the song of your choice. The Reference DAC will begin to play music from this point (assuming there are other songs following the one you have chosen, the Reference DAC will continue until the final song). 3. For further features such as repeat and shuffle, please see page 12. 4. USB Input (front Input) 1. Insert USB stick or other mass storage USB device into the front slot labeled ‘USB Mem’. Ensure the device is seated properly. 2. From the main menu, use the navigation buttons on the remote (or the Input knob on the front panel) to scroll to USB Input. Press the center navigation button, or ‘Select’ on the front panel. iPod/iPhone/iPad 3. Navigate through the menu structure to 1. Connect the cable supplied with your choose the desired folder(s), selecting Apple iPod, iPhone, or iPad to the input on each folder of your choice. Once you have the rear panel labeled ‘iPod’, with the 30reached the song level of the menu, you pin connector inserted into your device or will see notes appear next to each song dock. Ensure the cable is seated firmly at title. both connections. 4. Select the song of your choice. The 2. From the main menu, use the navigation Reference DAC will begin to play music buttons on the remote (or the Input knob from this point (assuming there are other on the front panel) to scroll to iPod dock. songs following the one you have chosen, Press the center navigation button, or the Reference DAC will continue until the ‘Select’ on the front panel. final song). 5. For further features such as repeat and shuffle, please see page 12. 19 Operation USB 2.0HS Input 1. Install the included software on your PC or Mac (see additional instructions regarding software installation on page 14). 2. Connect a USB cable from the computer to the input labeled USB 2.0 HS on the rear panel of the Reference DAC. 3. From the main menu, use the navigation buttons on the remote (or the Input knob on the front panel) to scroll to USB 2.0HS Input. Press the center navigation button, or ‘Select’ on the front panel. 4. Launch the appropriate software program on your computer for music playback. Internet Radio 1. From the main menu, use the navigation buttons on the remote (or the input knob on the front panel) to scroll to the Internet Radio input. Press the center navigation button, or ‘Select’ on the front panel. 2. Navigate through the different folders, selecting the appropriate choices. 3. Once you have reached radio station options, notes will appear next to the name of the station. Select the station of your choice to begin playback. AES/EBU, RCA, BNC and Toslink Inputs 1. Connect the appropriate cable from your source to the Reference DAC. Ensure the cable is seated firmly at both connections. 2. From the main menu, use the navigation buttons on the remote (or the Input knob on the front panel) to scroll to the appropriate Input. Press the center navigation button, or ‘Select’ on the front panel. 3. Begin music playback from source component. 20 Operation Troubleshooting Guide The audio intermittently distorts when running with the USB input? •Check to make sure you are using your computers USB 2.0 HS (480Mbps) port. A USB 2.0 FS (12Mbps) port will sometimes work but will distort. Most PC and Mac computers made after 2008 come stock with USB 2.0 HS ports. •On your PC go into the Device Manager, then USB Controller, then USB Root Hub panel and click on Properties and then Advanced; there it will say the speed of that USB port. The USB input is not working? •Make sure you SELECTED the USB as the input on the Reference DAC •Make sure you installed the DAC driver software from the CD that came with your Reference DAC and make sure the computer recognizes the Reference DAC is connected. •Make sure you are using a High Speed USB cable, one rated for 480Mbps. I don’t see the Reference DAC in the SOUND panel on my Mac or Windows PC computer? •After you install the DAC driver software you must make sure the Reference DAC is connected to the computer via the USB cable and plugged into an AC outlet otherwise the computer will not show the Reference DACs presence in the SOUND panel. In some cases it helps to RESTART your computer with the Reference DAC still connected; this allows the computer to finish the installation and place the DAC into the SOUND panel for selection. It is possible for a static discharge to temporarily disable the microprocessor that allows the controls to function. If this should occur, depress the ‘Mute’ button, then turn off the unit and unplug the DAC from the A.C. receptacle for 60 seconds. Reconnect the A.C. plug and turn the unit back on, along with other components. The controls should resume normal operation. If the problem persists, contact your dealer or Audio Research Customer Service at 763-577-9700. The volume is too loud or the audio is distorted using my Mac computer? •Check the VOLUME control setting in the AUDIO MIDI Setup panel. The Volume should be set to about 0.0dB for both channels. (The Mac computer allows the customer to increase the digital volume of the music past 0.0dBm consequently, the Mac can overdrive the Reference DAC and cause distortion. This is not an issue with the Windows PC where 0.0dBm is the maximum volume setting.) 21 Software Installation Windows PC Software Installation Instructions Installation of the DAC USB Audio Device drivers is only necessary when using the USB 2.0 HS input on the Reference DAC. Software installation is not necessary if only using the two Toslink or RCA inputs. Note to Mac OS users No driver installation is necessary when using a Mac computer in conjunction with the Reference DAC. Before starting, make certain the Reference DAC is disconnected from the PC system. You will be prompted to connectthe CD player at the proper time during the update/ installation procedure. Perform the following operations with theReference DAC disconnected from the PC. Note If you have had another Audio Research driver installed on your PC, please see page 29 for instructions to uninstall any previous driver versions before installing the new version. Load the new Audio Research “dacusb_v1.36.1_setup” driver folder onto your PC, via internet download or contact your sales representative (downloadable from: www.audioresearch. com/downloads.html). This may initially be a zip folder. 22 Software Installation Open (unzip) the new USB DAC driver folder and install the new driver, using the “setup.exe” program, highlighted in the previous illustration. Follow the installation steps when prompted. 23 Software Installation 24 Software Installation You will have the option to complete the process by connecting the Reference DAC at a later time if you choose. If so, click finish. Otherwise, when prompted during the install, connect the Reference DAC to a USB 2.0 H.S. or USB 3.0 port on your PC system. Prior to connecting the CD player, make certain the system is powered off. Next, connect to the USB port, and power on the Reference DAC. The PC system will acknowledge the presence of the CD player, and complete installation of the DAC USB device driver. This driver attachment can be found in the Windows Control Panel under:/Hardware and Sound/Devices and Printers. The device should be shown as “USB DAC 2.0”, or, depending upon the operating system, it may appear as “USB DAC 2.0 192”. (Please note that you will only see this device in the control panel if the source player is attached to the USB port and power is on for the Reference DAC). 25 Software Installation When the device driver is successfully installed, power down the Reference DAC momentarily, and power it up again (while remaining connected to the USB port on your PC). At this time, the system will automatically search for and complete installation of the audio output driver that is needed to format the audio output for Reference DAC. The system will prompt when completed “DAC USB WDM AUDIO device driver software installed successfully”. After the audio output driver is installed, your system drivers are configured and ready to play audio source files. Also, when the Reference DAC is connected and powered up, within the Windows: Control Panel/ Device Manager, you will be able to see the presence of the “DAC USB DEVICE”: 26 Software Installation If you open the window for that device, you will see the DAC USB device properties. Click on the “DRIVER” tab to see the current revision of the driver software installed. 27 Software Installation Next, You will need to direct your PC System music software player (e.g. JRiver, Foobar2000, Signalyst HQPlayer, etc.) to connect and play your audio tracks through the Reference DAC. With the CD player connected and powered up: Set your software preferences to the DAC USB output path. There is also a separate application control panel available for the Reference DAC. When attached and powered, the ARC icon will be located in the pop-up window in the bottom right corner of the PC master window: Finally, verify in the Windows Control Panel, under (Devices and Printers) that your Windows Speaker/Volume option is able to see and select the external Audio Research “USB DAC 1/2” audio output path. (Alternatively, you may need to select this path in the “Windows Speaker/Mixer” popup.) Select the “MIXER” and then choose the USB DAC 1/2 in order to set the audio output path to be directed to the DAC input. (Please remember that this output path will not show up or be selectable unless the Reference DAC is attached and powered up). 28 Software Installation Removal of previous driver versions Uninstall any prior/existing Audio Research Corp. system Drivers (Windows OS). Using your PC system, find and open the Windows “Control Panel” features. Find and open the “Uninstall Programs” for your particular computer. This may be named: “Programs” or “Programs and Features”. 29 Software Installation Find and select all programs named “DAC USB Driver” or similar, whose Publisher name is “AudioResearch”, “AudioResearchCorp” or “RigiSystems AG” or similar. Select Uninstall for each program found with this identity, and follow the directions to complete this process. 30 Software Installation After you click “Finish” you should see an updated Program listing with the driver(s) removed: 31 Maintenance Vacuum Tubes It is recommended that you replace the vacuum tubes of your Reference DAC in sets. All of the tubes in your DAC have been matched to have similar operating characteristics, to provide the best sound quality and reliability. Cleaning To maintain the visual appearance of your Reference DAC, occasionally wipe the front panel and top cover surfaces with a soft damp (not wet) cloth to remove dust. A mild, non-alkaline soap solution may be used to remove fingerprints or similar smudges. Cleaners containing abrasives should not be used as they will damage the brushed grain of the front panel finish, as well as the LED display window. A dry 2-inch pure bristle paint brush works well to remove dust from bevels, reliefs and switches. Servicing Because of its careful design and exacting standards of manufacture, your Reference DAC should normally require only minimal service to maintain its high level of performance. About Fuse Replacement The Reference DAC has two fuses; the mains fuse on the back panel, and an internal fuse towards the front, beneath the toroidal transformer. To access the internal fuse, remove the top cover. See specifications for information on fuse types. Disposal and Recycling Guidelines To dispose of this electronic product, do not place in landfill. In accordance with the European Union Waste Electrical and Electronic Equipment (WEEE) directive effective August 2005, this product may contain regulated materials which upon disposal require special reuse and recycling processing. Please contact your dealer or importing distributor for instructions on proper disposal of this product in your country. Or, contact Audio Research Corporation (763-577-9700) for the name of your importing distributor and how to contact them. Packing and shipping materials may be disposed of in a normal manner. Caution Your Reference DAC contains sufficient levels of voltage and current to be lethal. Do not tamper with a component or parts inside the unit. Refer any needed service to your authorized Audio Research dealer or other qualified technician. Should service be necessary, please contact your Audio Research dealer, or Audio Research Customer Service (763) 577-9700. 32 Limited Warranty Audio Research Corporation products are covered by a 3-Year Limited Warranty, or a 90-Day Limited Warranty on vacuum tubes. This Limited Warranty initiates from the date of purchase, and is limited to the original purchaser, or in the case of demonstration equipment, limited to the balance of warranty remaining after original shipment to the retailer or importer. In the unlikely event that technical service beyond the ability of the importer is required, Audio Research will fulfill the terms and conditions of the Limited Warranty. Such product must be returned at the purchaser’s expense to the Audio Research factory, along with a photocopy of the dated purchase receipt for the product, a written description of the problem(s) encountered, and any information necessary for return shipment. The cost of return shipment is the responsibility of the purchaser. In the United States, the specific terms, conditions and remedies for fulfillment of this Limited Warranty are listed on the warranty card accompanying the product in its shipping carton, or may be obtained from the authorized retailer or from the Audio Research Customer Service Department. Outside the United States, the authorized importing retailer or distributor has accepted the responsibility for warranty of Audio Research products sold by them. The specific terms and remedies for fulfillment of the Limited Warranty may vary from country to country. Warranty service should normally be obtained from the importing retailer or distributor from whom the product was purchased. 33 Compatibility and Connectivity Codecs MP3 Sampling Rate 8-48 kHz Resolution 16 bit Quality 8-320 kbit/s Tags ID3 V2.4 16 bit 8-320 kbit/s ID3 V2.4 AAC/AAC+v1/HE-AAC 24-96 kHz* Ogg Vorbis 1.0 32-48 kHz 16 bit Q1-Q10 Ogg comments 44.1-96 kHz 16/24 bit L0-L8 FLAC tags 176.4/192 kHz 16/24 bit L4-L8 FLAC tags 22-96 kHz 16/24 bit* - WAV tags FLAC FLAC (high sampling rates) LPCM LPCM (high sampling rates) WMA-9 WMA-9 lossless and WMA-9 pro *output sampling rate=max 48 kHz *16 bit Integer, 24 bit integer packed type1, 32 bit integer, IEEE-0.24 float type3 *16 bit Integer, 24 bit integer packed type1, 32 bit integer, IEEE-0.24 float type3 8-48 kHz 16 bit 5-320 kbit/s WMA tags - - - - Support through transcoding of unprotected tracks by Windows Media Connect only. ALAC 8-48 kHz 8/16/24 bit - - AIFF 8-96 kHz 8/16/24 bit - Id3v1 tags File Formats Protocols MP3 (MPEG-I Layer 3) AAC (MPEG-4 Advanced Audio Coding File) WAV WMA WAX ASX M3U PLS WPL JPEG HTTP/1.1 Audio Transport Shoutcast WMA Streaming (including MMS and WMS) RTSP/SDP (Real Time Streaming Protocols) over TCP Ethernet Ethernet - 10 Base-T Ethernet - 100 Base-T Ethernet PHY - Realtek iPod iPod over USB Extended mode supported (for iPad: streaming only) UPnP WiFi Wireless-LAN-IEEE 802.11b/g/n WiFi 802.11 compliant Infrastructure mode SSID - Site Survey WPA WPS USB USB 1.1 (FS) - Host USB 2.0 HS - Host UPnP digital media player (DMP) UPnP digital media renderer (DMR) Twonky compatible Asset UPnP compatible Windows Media Player (WMP 11 Vista & XP and WMP 12 Windows 7) compatible Philips Media Manager 3.3 compatible Intel Media Server compatible Mediatomb compatible Simple Centre compatible Control point SongBook Control point Cidero Control point PlugPlayer Connectivity IP DHCP Auto-IP Static IP Address Proxy Support Web server TFTP server LLTD Network API 34 Internet Services vTuner Specifications Frequency Response: Analog tube amplifier: +0-3dB, 0.5Hz to 200kHz at rated output. 0.15dB 20Hz to 20kHz. (Balanced, 200k ohms load). Digital Bandwidth Anti-aliasing filter @ Sample rate: 44.1kHz = 22kHz, 48kHz = 24kHz, 88.2kHz = 44kHz, 96kHz = 48kHz, 176.4kHz = 88.2kHz, 192kHz = 96kHz. Distortion: THD+N Less than .006% at 2V RMS BAL output. Signal-Noise-Ratio: 106dB Dynamic Range (AES17): 106dB IMD (SMPTE): .007% Gain: Max. Digital Gain: 25dB Balanced, 19dB SE. Input Impedance: Digital: 75 ohms BNC, RCA, 110 ohms AES/EBU, OPT 660nm TOSLink fiber 44.1 to 96kHz. Output Impedance: 600 ohms Balanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Output Polarity: Non-inverting. Rated Outputs: 2V RMS .5Hz to 100kHz into 200K ohm balanced load (maximum balanced output @ 0.0dB input level is 17V RMS at less than 0.05% THD+N at 1kHz) @ 192kHz sample rate. Digital Sample Rates: 44.1kHz to 192kHz, SPDIF, USB 2.0 HS and Wired Ethernet. 96kHz max over Wireless Ethernet. Master Oscillator: 22.579mHz ±20Hz for 44.1, 88.2 & 176.4kHz. 24.576mHz ±20Hz for 48, 96 & 192kHz sample rates. Intrinsic Jitter: <10ps Controls: Rotary volume selector (104 steps) and rotary input selector. Push buttons: Power, <, Select, >, Exit, Mute. Power Supplies: Electronically regulated low and high voltage supplies. R-core transformer & 7 low noise regulators. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%. Noise: -101dBV RMS 20-20kHz A-weighted (Volume at 1) Tube Complement: (4)-6H30 dual triodes, plus (1)-6550C and (1)-6H30 in power supply. Crosstalk: -90dB Power Requirements: 105-125VAC 60Hz (210-250VAC 50/60Hz) 140 watts maximum. Sleep mode 6 watts maximum. Dimensions: Width: 19” (48 cm) Height: 7” (17.8 cm) Depth: 15.5” (39.4 cm) Handles extend 1.50” (3.8 cm) forward of the front panel. Weight: 32.0 lbs. (14.6 kg) Net; 43.2 lbs. (19.8 kg) Shipping. This unit is RoHS compliant 35 There is only One Reference® H I G H D E F I N I T I O N® 3900 Annapolis Lane North Plymouth, MN 55447 www.audioresearch.com Specifications subject to change without notice. ©2016 Audio Research Corporation. Reproduction of this document in part or whole is expressly forbidden without written consent from Audio Research Corporation.