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Summary of Contents for Audio Research Reference 750
- Page 1 Owner’s Manual Reference 750 Monaural Amplifier ...
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Page 2: Table Of Contents
Contents Reference 750 Monaural Amplifier Illustrations 3 – 4 Preface 5 Packaging 5 Accessories 5 Vacuum Tubes and Preparation for Use 5 Installation 5 – 6 Warnings 6 Description of Controls 6 – 7 Connections 7 – 8 Operating Procedure 8... -
Page 3: Illustrations
POWER OUTPUT/BIAS CHECK CHECK CHECK CHECK LIGHT BIAS METER LINE VOLTAGE POWER VACUUM TUBE POWER AMPLIFIER REFERENCE 750 HIGH DEFINITION 3 ... -
Page 4: Reference 750 Monaural Amplifier
INPUT 200K BAL HOUR METER RESET REFERENCE 750 MONAURAL AMPLIFIER PLYMOUTH, MINNESOTA MADE IN U.S.A. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO PREVENT FIRE AND SHOCK HAZARD, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE. UNIT MUST BE OPERATED IN A HORIZONTAL POSITION. -
Page 5: Preface
Do not attempt to operate this amplifier before you install or attempt to operate your Audio installing the necessary vacuum tubes in their Research Reference 750 vacuum tube monoblock indicated sockets. The tubes are protectively power amplifier. Becoming familiar with important packed in a separate carton;... -
Page 6: Installation
6. At 170 lbs. (77.2 Kg) net weight per chassis, the the BIAS switch repeatedly and check the V5, V7, Reference 750 amplifier is too heavy for one V9, V11, V13 and V15 tube bias levels in the same person to lift. To avoid injury, do not attempt to way. -
Page 7: Connections
“-” speaker terminal to the wire that power level monitoring function. connects to the “0” terminal on the Reference 750. The Reference 750 is shipped from the factory with Connect the red or “+” speaker terminal to the wire all tubes properly biased and ready to use. -
Page 8: Operating Procedure
Then secure and align the tube cover If electronic crossovers or other AC powered completely, insert supplied screws and tighten equipment is used with the Reference 750 it may be moderately. necessary to use “ground lifter” adapters on the power plugs of that equipment to minimize system hum. -
Page 9: Servicing
Audio Research Corporation at 763-577-9700 (CST). or distributor has accepted the responsibility for When ordering a service manual from Audio warranty of Audio Research products sold by them. Research or an authorized dealer, be sure to The specific terms and remedies for fulfillment of the identify the serial number on your amplifier. -
Page 10: Specifications
Specifications POWER OUTPUT: 750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 750 watts, below .04% at 1 watt. Approximate actual power available at “clipping” 850 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition”...
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