Owner’s Manual Model Reference 210 MONOBLOCK POWER AMPLIFIER 3900 ANNAPOLIS LANE NORTH / PLYMOUTH, MINNESOTA 55447-5447 / PHONE: 763-577-9700 FAX: 763-577-0323
Model Reference 210 Infrared eye for remote control DISPLAY V1 V2 ● REFERENCE 210 ® HIGH DEFINITION VACUUM TUBE POWER AMPLIFI ER POWER Bias adjustment pot “On” Indicator Bias adjustment pot REFERENCE 210 POWER AMPLIF IER INPUT (200 Ω BAL) PLYMOUTH, MINNESOTA MADE IN U.S.A. WARNING TO PREVENT FIRE AND SHOCK HAZARD, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE. UNIT MUST BE OPERATED IN A HORIZONTAL POSITION.
Model Reference 210 INTENSITY HOURS Adjusts level of display illumination. Seven levels including off. Displays accumulated hours of vacuum tube service life. DOWN UP POWER SCALE Displays bias level in mA of each output tube. (See bias adjustment instructions in owners manual.) DOWN Selects power output via moving logarhithmic bar graph: 0-10 watts, 0-50, 0-100, 0-200.
Model Reference 210 1
Model Reference 210 Preface Please take time to carefully read and understand the following information and instructions before you install or attempt to operate your Audio Research Reference 210 vacuum tube monoblock power amplifier. Becoming familiar with important facts about your amplifier and its correct operating procedures will help assure maximum musical satisfaction and reliable operation. Packaging Save all packaging accompanying this product.
Model Reference 210 electronics technician. 3. Use only the plastic insulated screwdriver included with this unit when making front panel bias adjustments. 4. The power cord on this unit is safety-tested and is equipped with a proper grounding plug. If used normally, it will provide a safe earth ground connection of the chassis. Defeat of the grounding plug, or any unauthorized modification of the active circuitry or controls of this unit, automatically voids warranty coverage, 5.
Model Reference 110 display of A.C. line voltage entering the amplifier, shown in large numerals. Amplifier is muted when checking line voltage. Connections INPUT CONNECTOR: The Reference 210 uses a fully balanced circuit topology and thus has one balanced XLR input connector on the rear panel. It therefore requires a balanced preamplifier output, as provided by most Audio Research preamplifiers. Connect your preamplifier's output to the Reference 210 before turning on the amplifier.
Model Reference 110 Remote Turn-on Connections Bias Adjustment Procedure The Reference 210 has a built-in 12VDC remote turn-on/off circuit for operation by a master control system in a home theater or large audio system. Use a 3.5mm (.140") diameter mono mini plug to connect to the +12V IN jack on the rear of the Reference 210. Two identical paralleled jacks are provided to allow chaining connections to control two or more Reference 210s or other equipment. 1.
Model Reference 110 CAUTION: The Reference 210 amplifier contains sufficient levels of voltage and current to be l e t h a l. Do not tamper with a component or part inside the unit. Even with the power turned off, a charge remains in the energy storage capacitors for some time. Refer any needed service to your authorized Audio Research dealer or other qualified technician.
Specifications POWER OUTPUT: 210 watts per channel continuous from 20Hz to 20kHz. 1 kHz total harmonic distortion typically 0.5% at 210 watts, below .02% at 1 watt. Approximate actual power available at “clipping” 240 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition” i. e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.) POWER BANDWIDTH: (-3dB points) 10Hz to 150kHz.
