background image

Read  Information 

—  All  the  safety  and  operating  information  should  be  read  before  the  amplifier  is 

plugged in. 
 

Follow Information 

— All operating and use information should be followed. 

 

Retain Information 

— Retain the safety and operating information for future reference. 

 

Heed Warnings 

— All warnings on the amplifier & in the operating instructions should be heeded. 

 

Ventilation

 — The amplifier should be situated so that its location or position does not interfere with its 

proper ventilation. The amplifier should never be placed near or over a radiator or heat register. The am-
plifier should not be placed in a built-in installation such as a bookcase or cabinet that may impede the 
flow of air through the ventilation openings. Do not place this amplifier directly on carpeted floors. 
 

Non-Use  Periods 

— Amplifiers that are left unattended should be turned off via the rear panel switch to 

extend the life of the tubes and conserve energy. 
 

Grounding or Polarization 

— Do not defeat the safety purpose of the polarized or grounding-type plug. 

A polarized plug has two blades with one blade wider than the other blade. A grounding type plug has 
two blades and a third grounding prong. The polarized wide blade and the third prong are provided for 
your safety. If the provided plug does not fit your outlet, consult an electrician for replacement of the ob-
solete outlet. 
 

Power  Cord  Protection 

—  Protect  the  power  cord  from  being  walked  on  or  pinched  particularly  at 

plugs, convenience receptacles and the point where they exit from the amplifier. 
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 through the openings of these amplifiers, 

as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. 
Care  should  be  taken  so  that  objects  do  not  fall  and  liquids  are  not  spilled  into  the  amplifier  through 
openings in the enclosure. 
  

Servicing 

—  Do  not  attempt  to  service  these  amplifiers  yourself,  as  opening  or  removing  the  bottom 

cover WILL expose you to dangerous high voltages. Refer all servicing to Bob Carver LLC.  

 
Damage Requiring Service 

— These Amplifiers should be serviced by Bob Carver LLC when:  

A power supply connection or a plug has been damaged or  
If liquid has been spilled into the amplifier or objects have fallen into the amplifier or  
The amplifier has been exposed to water or moisture or  
The amplifier does not appear to operate normally or exhibits a marked change in performance or  
The amplifier has been dropped or the enclosure damaged.  

 

Replacement  Parts 

— When replacement parts are required, be sure the service technician has used 

replacement  parts specified  by  the  manufacturer  or  that  have  the  same  characteristics  as  the  original 
part. Unauthorized substitutions may result in fire, electric shock, or other hazards.  

 
Safety Check 

— Upon completion of any service or repairs to this audio product, ask the service techni-

cian to perform safety checks to determine that the audio product is in proper operating condition.  

 
Lightning Storms 

— Unplug this amplifier during lightning storms or when unused for long periods  

 

IMPORTANT SAFETY INFORMATION 

Page 6 

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...

Reviews: