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COOLING 

 

  
Convection cooling - Cool air is drawn from under the chassis by the heat from the tubes acting as an air 
pump, and exhausting the warm air out the chassis through the side vents. Do not place the amplifier on 
a carpet or in a closed cabinet. You must allow the feet to do their job by keeping the bottom raised, al-
lowing unimpeded airflow.  

  
  

NEW AMPLIFIER SMELL 

  
We  burn-in  these  amplifier  in  for  72  hours  using  a  1  KHZ  sine  wave  driving  4  ohm  loads.  But,  like  a 
brand new car, this amplifier possesses a "new amplifier smell". When powered up for the first time, the 
fresh paint and recent skin oils on the tubes will create a new hot amp smell. It will dissipate with use, 
usually requiring about six weeks of normal operation 

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Summary of Contents for Black Magic 20

Page 1: ...Black Magic 20 20 Watt Stereo Amplifier OWNERS MANUAL...

Page 2: ...tage to be delivered to the loudspeaker at very low fre quencies providing an exceptional and satisfying low end response SAFE OPERATING CONDITIONS Before connecting the amplifier up please read the f...

Page 3: ...ause the DC restorer circuit eliminates that need Please note we have selected the M version of the EL84 because it has a higher plate volt age rating than the non M tubes made by many manufacturers T...

Page 4: ...for each channel The black bind ing posts are common red posts carry the audio output signals This amplifier is officially rated for 4 ohms minimum To connect the speaker first check the impedance of...

Page 5: ...e feet to do their job by keeping the bottom raised al lowing unimpeded airflow NEW AMPLIFIER SMELL We burn in these amplifier in for 72 hours using a 1 KHZ sine wave driving 4 ohm loads But like a br...

Page 6: ...eferenced into 20 watts Hum 100dB Frequency Response 8 Hz to 40kHz 3dB Full Power Bandwidth 26 Hz to 43 kHz without filters Distortion Less than 0 5 Output Transformer Interleaved windings super wideb...

Page 7: ...lifier Water Do not use the amplifier near water Cleaning Unplug the amplifier from the AC outlet before cleaning Use only a dry cloth to clean Object and Liquid Entry Never insert objects of any kind...

Page 8: ...CAUTION Changes or modifications not expressly approved by BOB CARVER LLC will void the manufacturer s warranty Page 7...

Page 9: ...use abuse or damage by circumstances beyond Bob Carver LLC s control or due to improper operation maintenance or storage or to other than normal use or service The foregoing warranties do not cover re...

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