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Preface

Please  take  time  to  carefully  read  and  understand  the 
following instructions before you install or attempt to oper-
ate  this  equipment.  Becoming  familiar  with  the  product 
and its correct operating procedures will help assure you of
maximum  musical  enjoyment  and  reliable  operation.  The
effort  you  invest  now  will  be  well  rewarded  in  the  years
ahead

Packaging

Save  all  the  packaging  in  a  dry  place.  Your  Audio 
Research amplifier is a precision electronic instrument and
should  be  properly  cartoned  any  time  shipment  is  made.
Because of its weight, it is highly probable that the unit will
be  damaged  during  shipment  if  repackaged  in  cartoning
other than that designed for the  unit.

You may not have occasion to return the unit to the factory
for  service,  but  if  that  should  prove  necessary,  or  other 
occasion to ship it occurs, the original packaging may save
your  investment  from  unnecessary  damage,  delay  and 
expense.

Unpacking

The  VS115  is  packed  in  a  heavy-duty  carton  with  special
foam  inserts  for  maximum  protection.  Because  of  the
weight  of  the  unit  and  because  it  is  a  precision  electronic
instrument,  it  is  necessary  to  take  reasonable  care  during
unpacking and preparation for use.

Open  the  carton  with  a  small  knife  to  carefully  slit  the
taped edges of the top flaps. Fold the flaps to the sides and
remove  the  tubes  packed  in  foam  blocks.  Roll  the  unit  in
the carton upside down on a soft surface and lift the carton
off and turn the unit right side up, then remove the foam
inserts.  Carefully  remove  the  plastic  wrap.  Keep  all  foam 
inserts and store the carton system for future use.

Accessories

2 – Gold jumpers for SE operation
1 – Plastic screwdriver for bias adjustments
1 – 20A IEC detachable power cord

User replaceable spare fuses include:

1 – 10 Amp MDQ slo-blo with 120V units or 100V units
1 – T6.3A 250V slo-blo with 220V/240V units

Summary of Contents for VS115

Page 1: ...3900 ANNAPOLIS LANE NORTH PLYMOUTH MINNESOTA 55447 5447 PHONE 763 577 9700 FAX 763 577 0323 www audioresearch com Model VS55 STEREO POWER AMPLIFIER Owner s Manual...

Page 2: ...ccessories 1 Warnings 1 Preparation for Use 1 Panel Controls 1 Use of Controls 1 Installation 2 Connections 2 Remote Turn on Connections 3 Operating Procedure 3 Servicing 3 Output Tube Bias Adjustment...

Page 3: ...RIZONTAL POSITION DO NOT OPERATE WITH COVERS REMOVED UNIT CONTAINS VOLTAGES WHICH MAY BE HAZARDOUS MODEL VS55 STEREO AMPLIFIER VOLTS SERIAL PLYMOUTH MINNESOTA MADE IN U S A T4A 230V 330 WATTS MAX 50 6...

Page 4: ...This unit contains voltages which can cause serious injury or death Do not operate with covers removed Refer servicing to your authorized Audio Research dealer or other qualified personnel 4 The 14 g...

Page 5: ...ossible an impedance match between the amplifier and speaker for optimum transfer of power to the speaker with minimum distortion In the case of speaker systems with significant variations in impedanc...

Page 6: ...ards of manufacture your VS55 amplifier should normally require only minimal service to maintain its high level of perfor mance CAUTION The VS55 amplifier contains sufficient levels of voltage and cur...

Page 7: ...ty 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 descrip tion of the problem s e...

Page 8: ...Model VS115 5...

Page 9: ...e Audio Research Customer Service Department Outside the United States the authorized importing retailer or distributor has accepted the responsi bility for warranty of Audio Research products sold by...

Page 10: ...t occurs the original packaging may save your investment from unnecessary damage delay and expense Unpacking The VS115 is packed in a heavy duty carton with special foam inserts for maximum protection...

Page 11: ...is the custom of some audio philes to achieve maximum sonic performance on demand While this is often recommended for solid state equipment Audio Research does not recommend this procedure for vacuum...

Page 12: ...ct connection between audio common ground and true earth ground occurs in the preamplifier through its grounded power cord Other equipment in the system should have some form of isola tion to prevent...

Page 13: ...ch Cus tomer Service For best performance the 6550C output tubes should be matched pairs Additional questions regarding the operation maintenance or servicing of your amplifier may be referred to Audi...

Page 14: ...d 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 import...

Page 15: ......

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