User Guide REFERENCE PHONO 10 Phono Preamplifier H I G H D E F I N I T I O N®
Contents Preface 3 Illustrations Audio Chassis 4 Power Supply Chassis 5 Warnings 6 Installation Installation of Vacuum Tubes 7 In Your System 8 Connections 9 Operation Power-Up Procedure 10 Front Panel Controls 11 Remote Control Only Controls 12 Interactive Touch Screen Operation 13 - 15 Troubleshooting 15 Maintenance Servicing 16 Cleaning 16 Disposal and Recycling Guidelines 16 Limited Warranty 17 Specifications 18
Preface Thank you for selecting the Reference Phono 10 as part of your music listening system. The engineers and designers at Audio Research have spent countless hours of listening and testing to create a preamplifier of the highest caliber for music reproduction. The Reference Phono 10 has been designed to provide you many years of playback. Please take a few minutes to read through this guide to help you better understand and optimize your new preamplifier.
Illustrations Audio Chassis POWER MUTE FROM POWER SUPPLY CABLE "A" PLYMOUTH, MINNESOTA MADE IN U.S.A. REFERENCE PHONO 10 RIGHT STEREO PHONO PREAMPLIFIER RIGHT LEFT OUTPUT SINGLE ENDED BALANCED RIGHT OUTPUT BALANCED FROM POWER SUPPLY CABLE "B" SINGLE ENDED WARNING INPUT 1 INPUT 2 TURNTABLE GROUND TO PREVENT FIRE AND SHOCK HAZARD, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE. UNIT MUST BE OPERATED IN A HORIZONTAL POSITION.
Illustrations Power Supply Chassis TO AUDIO CHASSIS CABLE "A" PLYMOUTH, MINNESOTA MADE IN U.S.A. REFERENCE PHONO 10 TO AUDIO CHASSIS CABLE "B" STEREO PHONO PREAMPLIFIER WARNING TO PREVENT FIRE AND SHOCK HAZARD, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE. UNIT MUST BE OPERATED IN A HORIZONTAL POSITION. -DO NOT OPERATE WITH COVERS REMOVEDUNIT CONTAINS VOLTAGES WHICH MAY BE HAZARDOUS.
Warnings To prevent fire, or shock hazard, do not expose your Reference Phono 10 to rain or moisture. This unit contains voltages which can cause serious injury or death. Do not operate with cover removed. Refer servicing to your authorized Audio Research dealer, service center or factory. The detachable power cord on your Reference Phono 10 is equipped with a heavy gauge, 3-conductor cable and a standard three-prong grounding plug. For absolute protection, do not defeat the ground power plug.
Installation Installation of Vacuum Tubes Before operating the Reference Phono 10... This unit has been shipped with the vacuum tubes installed in protective foam in a separate box packed inside the shipping carton. Remove the tubes carefully from the protective foam. Using a phillips-head screwdriver to loosen the fastening screws, remove the top cover and set aside. After removing the top cover and the vacuum tubes packed in protective foam, see the accompanying illustrated sheet (fig.
Installation In your System While the Reference Phono 10 does not dissipate an unusual amount of heat, it is important that it be provided with reasonable airflow to assure long, trouble-free operation. In addition, the following installation guidelines will help insure maximum sonic performance as well as reliable service: Operate unit in upright and horizontal position, prefer-ably on solid, nonmetal shelving.
Connections Input Connections The Reference Phono 10 offers two sets of RCA input connectors, for connecting multiple turntable/tonearm cables. There is a ground terminal connection adjacent to the RCA input connectors to allow grounding of the turntable(s). Output Connections There is one set of BAL and one set of RCA output connectors for connecting to line inputs (Direct, Aux, Phono, Tuner, etc.) of your linestage/preamplifier.
Operation Power-Up Procedure Secure all rear-panel connections between Reference Phono 10 and the preamplifier. Connect umbilical cables between the Reference Phono 10 Audio and power supply chassis. Twist outer ring to secure. 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. Press power switch (either remote or front panel).
Operation Front Panel Controls The front panel of the audio chassis of the Reference Phono 10 features two buttons, and an interactive touch screen. Power On/Off: (left button) Supplies power from A.C. wall outlet to preamp; indicated by active display window. The Reference Phono 10 requires approximately 40 seconds to warm up; this time is required to stabilize the power supply. See ‘Power-Up Procedure’ on the adjacent page for details. The same cycle also occurs in the event of a power interruption.
Operation Remote Only Functions Load (50, 100, 200, 500, 1K, 47K, Custom): Select the appropriate load to match the resistance of your phono cartridge. If not set with a specific value when manufactured, the default value for the Custom setting is 47K (note that the value for the custom setting can be adjusted by Audio Research or an authorized Audio Research service center). Input 1/Input 2: Selects the input for playback. Lo Gain/Hi Gain: Selects the amount of gain for playback.
Operation Interactive Touch Screen Operation The Reference Phono 10 has been designed with a 7” interactive touch screen for reliable and easy usage. The interface is programmed so that the desired item for change simply needs to be touched to either toggle between functions, or bring up a secondary menu for function selection. Input Selection: To change inputs, touch the currently displayed input name on the screen. The input bar will appear, listing both input options.
Operation SETTINGS MENU Touching the settings icon located in the bottom right of the screen (it appears as a gear) brings you to a submenu with different options related to the setup and functionality of the Reference Phono 10 (fig. 7). fig. 7 Input Names: Selecting Input Names will allow you to customize the names of each input on the Reference Phono 10. Once selected, the input bar will appear at the top of the screen with an alphanumeric keyboard below it.
Operation Foreground/Background Color: The Reference Phono 10 has ten color options for both screen background and text. Selecting either one of these options from the settings menu will allow you choose a new color to customize the display on your Reference Phono 10. Please note that the currently selected color is not displayed in the choices shown, nor do you have the option to choose the same color for both the background and foreground (fig. 8). fig.
Maintenance Servicing CAUTION: Your Reference Phono 10 contains sufficient levels of voltage and current to be lethal. Do not tamper with a component or part inside the unit. Refer any needed service to your authorized Audio Research dealer or other qualified technician. The vacuum tubes inside your Reference Phono 10 are quality tubes and with normal use should offer approximately 2,000 hours of use for the 6550 and 4,000 hours for the 6H30.
Limited Warranty Audio Research Corporation products are covered by a 3-Year Limited Warranty, or a 90-Day Limited Warranty (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.
Specifications Frequency Response: ± .2dB of RIAA, 10Hz to 60kHz; 3dB points below 0.3Hz and above 300kHz. Distortion: Less than .002% at 1.0V RMS 1kHz output. Gain: Selectable 51dB (Low), 74dB (High) at1kHz BAL; 45dB (Low), 68dB (High) at1kHz SE. (MC & MM compatible). Buttons: Front (2) Power, Mute Input Impedance: 47K ohms and 100pF SE. Selectable loads: 1000, 500, 200, 100, 50 ohms and Custom. Phono Equalization: (Selectable) RIAA, Columbia, Decca. Output Polarity: Non inverting.
