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Characteristics   
 

Frequency response 

 

  

20-55KHZ   

Power  

 

 

Ultralinear 

 

                     75W/channel  

 

Triode   

 

                     40W/channel  

 

Mono (Ultralinear). 

 

 

130W.  

 

Mono (triode).  

 

 

70W.  

Noise 

 

 

 

 

1.2M.V.  

Maximum total harmonic distortion 

0.1%   

Weight 

 

 

 

 

30.5KG.  

Power consumption  
 

 

Standby 

 

 

170W.  

 

 

Max. output 

 

 

585W.  

 

 

LIMITED WARRANTY 

What is Covered and What is Not Covered  

Except as specified below, this warranty covers parts and 
labor to correct all defects in materials and workmanship. 
The following are not covered by the warranty:  

1.  Damage,  deterioration,  malfunction  or  failure  to  meet 
performance specifications resulting from: 

 a. Accident, acts of nature, misuse, abuse, neglect 
or unauthorized product modifications  

b.  Improper  installation,  removal  or  maintenance, 
or  failure  to  follow  instructions  supplied  with  the 
product.  

c.  Repair  or  attempted  repair  by  anyone  not 
authorized  by  Margules  Audio  to  repair  the 
product.  

d.  Any  shipment  of  the  product  (claims  must  be 
presented to the carrier).  

e. Any cause other than a product defect.  

2.  Cleaning,  initial  set-up,  check-ups  with  no  defects 
found,  or  charges  incurred  for  installation,  removal  or 
reinstallation of the product.  

3.  Any  product,  on  which  the  serial  number  has  been 
defaced, modified or removed.  

4.  Accessories,  including  but  not  limited  to,  batteries, 
cables,  mounting  hardware  and  brackets,  cleaning 
accessories, antenna and detachable power cords.  

5.  Warranty  is  void  if  purchase  was  made  from  anyone 
other than an authorized Margules Audio dealer.  

Who May Enforce the Warranty?  

This  warranty  extends  to  products  purchased  directly 
from  Margules  Audio  or  an  authorized  Margules  Audio 
dealer. Purchasers should inquire of the dealer regarding 
the nature and extent of the dealer’s warranty, if any. 

 

 

 

Summary of Contents for U280SC

Page 1: ...Amplifier U280 SC 25th anniversary...

Page 2: ...ndry tub or in a damp environment like a basement or outside in the rain 5 WALL OR CEILING MOUNTING Mount the unit to a wall or ceiling only in the manner recommended by the manufacturer 6 OBJECT AND...

Page 3: ...lightning and power line surge damage 13 POWER LINES Do not locate an outside antenna system in the vicinity of overhead power lines or other electric light or power circuits When installing an outsid...

Page 4: ...TEM INSTALLER This reminder is provided to call the CATV system installer s attention to article 820 40 of the NEC ANSI NFPA 70 which provides guidelines for proper grounding and in particular specifi...

Page 5: ...ode provides information regarding proper grounding of the mast and supporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna dis...

Page 6: ...the aerospace industry assuring long trouble free operation The New U280 SC 25th Anniversary Stereo Tube Amplifier includes a new and improved differential output as well further reducing the THD and...

Page 7: ...SETUP IMPORTANT The amplifier should be unplugged from the wall outlet First choose the proper output impedance accordingly to your speaker both channels should be the same 1 2 ohms from 1 to 2 ohms l...

Page 8: ...change the tubes just unplug the A C power line cord pull out the old ones and insert the new tubes the active bias will balance them We recommend matched pair output tubes but this is not indispensa...

Page 9: ...an use a soft lightly humid cloth WARNING Never take the tubes out while the amplifier is plugged It is important to substitute the tubes with the correct numbers Troubleshooting Doesn t turn on Look...

Page 10: ...fields near the signal ones Because you have a servo controlled bias and the BEFS always use the best interconnections cables AC power line and loudspeakers cables that you can get We recommend havin...

Page 11: ...ed with the product c Repair or attempted repair by anyone not authorized by Margules Audio to repair the product d Any shipment of the product claims must be presented to the carrier e Any cause othe...

Page 12: ...ntability and fitness for particular purchase are limited in duration to the length of this warranty Exclusion of Damages Margules Audio s liability for any defective product is limited to repair or r...

Page 13: ...525 514 7448 Toll free 1 888 538 8605 FAX 525 533 4654 Email info margules com mx MARGULES USA 820 Elm Drive div PetalumaCA 94952 Phone number 707 5811830 Collect USA Canada 1 888 538 8605 Fax number...

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