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keep it away from external sources of heat, such as radiators, hot-air ducts or intense direct 

sunlight, and provide reasonable  ventilation. The  GFA-575se should never be placed with 

other heat-producing components in a cabinet or enclosure lacking free air flow. You should 

also provide adequate space around the amplifier to insure good air circulation.

   

 

The  top,  bottom  and  side  panels  of  the  amplifier  have  been  provided  with  slots  to  allow 

necessary cooling of the internal components of the amplifier. 

This  GFA-575se Required 

Four Inches of Clearance on the Top and All Sides. 

You should ensure that these slots 

are not obstructed in any way.   

 

We advise that you refrain from stacking other components on top of the  GFA-575se. Not 

only will the heat generated by the amplifier affect the performance of equipment stacked on 

top of  the  GFA-575se,  but  the free flow  of air  through  the  ventilating  slots  provided  in  the 

chassis  of  the amplifier  may  be  partially  obstructed.  If  you  require  that  the  GFA-575se  be 

mounted  in  an  enclosed  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  recommendations,  the  GFA-575se  will  perform  quite  reliably  in  any 

reasonable  environment.  You  should  also  pay  attention  to  such  routine  considerations  as 

protection from excessive dust and moisture. Occasional vacuuming of accumulated dust on 

the surfaces of the chassis, panels and heatsinks should be all that is required.   

 

CONNECTING THE GFA-575se

 

The  optimal  performance  of  the  GFA-575se  will  ultimately  depend  on  the  care  with  which 

you perform the connections to the amplifier, the preamplifier and the loudspeakers. All the 

input- and output-signal connections should be made only with high-quality, low-loss cables 

following  the  recommendations  made  in  the  individual  sections  below.  Please  refer  to  the 

rear-panel diagram to identify all the connections and their locations.   

 

NOTE

 

WHENEVER  CONNECTIONS  TO  OR  FROM  THE  GFA-575se  ARE  BEING  MADE,  BE 

CERTAIN THAT THE POWER SWITCH ON THE AMPLIFIER IS IN ITS OFF POSITION, 

THE AC LINE CORD OF THE AMPLIFIER IS DISCONNECTED FROM THE AC WALL 

OUTLET AND THAT ALL ASSOCIATED COMPONENTS ARE TURNED OFF.

 

 

 

 

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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