Audio Research Reference 75 Manuale del Proprietario

!!!Owner’s Manual !!!!!!! Model Reference 75 Stereo Power Amplifier !

!10!Specifications POWER OUTPUT: 75 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 75 watts, below 0

!2!Contents Model Reference 75 Stereo Amplifier Illustrations 3 Preface 4 Packaging 4 Accessories 4 Warnings 4 Vacuum Tubes and Preparation fo

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!4!Preface Please take time to carefully read and understand the following instructions before you install or attempt to operate this e

!5! DO NOT ATTEMPT TO OPERATE THIS EQUIPMENT BEFORE INSTALLING THE NUMBERED VACUUM TUBES IN THEIR RESPECTIVE SOCKETS. Vacuum Tubes and

!6!The ‘ambient’ operating temperature should never exceed 120 F or 49 C. Improper installation will cause premature tube failure and

!7!The Reference 75 uses a grounding system that does not require a ground-lifter adaptor plug on the A.C. power cord to minimize hum. T

!8! Output Tube Bias Adjustment As shipped from the factory, the output ‘bias’ adjustments are set for a nominal 65mA per KT120 tube.

!9!Cleaning To maintain the new appearance of this amplifier, occasionally wipe the front panel and top cover with a soft, damp (not