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SERVICING-North America

 

ADCOM  has  a  Technical  Service  Department  to  answer  questions  pertinent  to  the 

installation and operation of your unit. In the event of difficulty, please contact us for prompt 

advice. If your problem can not be resolved through our combined efforts, we may refer you 

to  an  authorized  repair  agency,  or  authorize  return  of  the  unit  to  our  plant.  To  aid  us  in 

directing you to a convenient service station, it would be helpful if you indicate which major 

city is accessible to your home. 

Please address mail inquiries to: 

 

 

 

Phone or Fax inquiries: 

ADCOM-USA/J&B DISTRIBUTION   

 

 

Monday through Friday 

PO BOX 54096   

 

 

 

 

 

 

9:00AM to 4:00PM Arizona Time 

PHOENIX, AZ 85078   

 

 

 

 

 

Phone Number: 480-607-2277 

U.S.A.   

 

 

 

 

 

 

 

 

email[email protected] 

 

When calling or writing about your  GFA-575se, be sure to note and refer to its model and 

serial  numbers  as  well  as  the  date  of  purchase  and  the  ADCOM  authorized  dealer  from 

whom  it  was  purchased.  In  the  event  the  unit  must  be  returned  for  service,  you  will  be 

instructed  as  to  the  proper  procedure  when  you  call  or  write.  UNDER  NO 

CIRCUMSTANCES  SHOULD  YOUR  UNIT  BE  SHIPPED  TO  US  WITHOUT  PRIOR 

AUTHORIZATION,  OR  PACKED  IN  OTHER  THAN  ITS  ORIGINAL  CARTON  AND 

FILLERS. 

 

Always  ship  PREPAID 

VIA 

UPS,  FEDEX  OR  OTHER  APPROVED  CARRIER.  DO  NOT 

SHIP VIA PARCEL POST, since the packing  was not  designed to withstand rough Parcel 

Post handling. FREIGHT COLLECT SHIPMENTS WILL NOT BE ACCEPTED. 

 

 

Summary of Contents for GFA-575se

Page 1: ...ADVANCED POWER AMPLIFIER GFA 575se The contents of this manual are subject to change Please check our website www adcom com or www adcom usa com for the most current version Copyright 2016 Adcom LLC...

Page 2: ...ier can drive a very broad range of loudspeakers including those with very low impedances at sustained high power levels even when the impedances are highly reactive Great care was taken to insure tha...

Page 3: ...he amplifier operates in its optimal range regardless of the length of time and the level of operation All internal point to point wiring is OFC and the highest grade parts consistent with their appli...

Page 4: ...ess in both appearance and performance After you have unpacked the GFA 575se inspect it for physical damage Save the shipping carton and all internal packing materials as they are intended to reduce t...

Page 5: ...cabinet it is recommended that the rear panel of the cabinet be provided with vents or slots at the bottom and top to allow air to circulate freely through the cabinet If you observe these recommendat...

Page 6: ...nce This is particularly important if you use a long run between the preamplifier and the amplifier or if your preamplifier has a high output impedance Generally speaking a cable with a capacitance of...

Page 7: ...pair of loudspeakers and the LEFT STEREO OUTPUT to the left channel loudspeaker Be certain when the GFA 575se is used in Its stereophonic mode the STEREO BRIDGED MONO INPUT switch is in the STEREO po...

Page 8: ...dspeakers there are some other requirements which you should observe in order to insure maximum performance from your amplifier It is most important that you make certain the wiring you have selected...

Page 9: ...down to 2 ohms can be connected to and driven by the GFA 575se The GFA 575se can drive these low impedances at more than adequate power levels with no difficulty It should be noted here that many lou...

Page 10: ...l of the loudspeaker to the negative terminal of the loudspeaker and vice versa Repeat the listening test with the mono signal to make sure you are correct in your initial evaluation If you can now ac...

Page 11: ...plifiers in the bridged configuration Therefore an 8 ohm loudspeaker will be seen by the amplifier as if it were a 4 ohm load a 4 ohm loudspeaker load will be seen by the amplifier as a 2 ohm load NOT...

Page 12: ...loudspeakers to or from the RIGHT LEFT STEREO SPEAKER OUTPUTS Should you inadvertently short out the RED and BLACK STEREO SPEAKER OUTPUTS enough power may remain in the power supply to cause sufficien...

Page 13: ...the blades can be fully inserted to prevent blade exposure AC LINE FUSE The AC LINE FUSE protects the electronic circuits of the GFA 575se This fuse normally will blow only if there is an overload wit...

Page 14: ...ARRANTY To remove a blown or suspect fuse from its fuse holder use only a number 2 Phillips screwdriver to prevent damage to the fuse holder Simply press lightly on the fuse holder cap and turn counte...

Page 15: ...color to blue color amplifier goes into operation status The POWER LED indicates that there is AC voltage of GFA 575se being fed to the amplifier Additionally the internal power transformer is provid...

Page 16: ...se the THERMAL PROTECTION to be activated or in extreme cases damage your loudspeakers THE LIMIT PROTECTION LED There are two statuses for the LIMIT PROTECTION LED Firstly when power on the amplifier...

Page 17: ...REDUCE THE VOLUME LEVEL DEMANDS RECTIFY THE LOAD IMPEDANCE CONDITION WHICH MAY BE CAUSING ACTIVATION OF THIS CIRCUITRY INSTALL AN AUXILIARY FAN OPTION OR IN EXTREME CASES UNDERTAKE ALL THREE CARING FO...

Page 18: ...ough Friday PO BOX 54096 9 00AM to 4 00PM Arizona Time PHOENIX AZ 85078 Phone Number 480 607 2277 U S A email info adcom usa com When calling or writing about your GFA 575se be sure to note and refer...

Page 19: ...atts continuous average power into 8 ohms at any frequency between 20Hz and 20kHz at less than 0 10 THD bridged IM Distortion SMPTE 1 watt to 350 watts into 8 ohms 0 03 1 watt to 450 watts into 4 ohms...

Page 20: ...room into 4 Ohms 1 25dB Signal to Noise Ratio A Weighted 350 watts into 8 ohms 113dB Gain 27 0dB Input Impedance 22 000 ohms Input Sensitivity 350 watts into 8 ohms 2 36V rms 1 watt into 8 ohms 126mV...

Page 21: ...Adcom LLC No part of this manual may be reproduced or electronically transmitted without the express written consent of Adcom LLC Adcom LLC shale not be liable for any errors contained herein or for a...

Page 22: ...21...

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