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 5

20.5 brackets or the keyhole wall mount adapter 
provided with the loudspeaker. See Genelec Ac-
cessories Catalogue on www.genelec.com for a 
complete list of mounting hardware options.

Maintenance

No user serviceable parts are to be found within 
the amplifier unit. Any maintenance or repair of the 
4020B unit should only be undertaken by qualified 
service personnel. 

Safety considerations

Although the 4020B has been designed in accord-
ance with international safety standards, the fol-
lowing warnings and cautions should be observed 
to ensure safe operation and to maintain the loud-
speaker under safe operating conditions:
 
• 

Servicing  and  adjustment  must  only  be  

 

performed by qualified service personnel.  

 

The loudspeaker must not be opened.

• 

Do  not  use  this  product  with  an  unearthed  

  mains cable or an unear thed mains 

 

  connection as this may compromise 

 

 

electrical safety.

• 

Do  not  expose  the  loudspeaker  to  water  or  

 

moisture. Do not place any objects filled with 

 

liquid, such as vases on the loudspeaker or  

 

near it. 

• 

This  loudspeaker  is  capable  of  producing  

 

sound pressure levels in excess of 85 dB,  

 

which may cause permanent hearing 

 

 damage.
• 

Free  flow  of  air  behind  the  loudspeaker  is  

 

necessary to maintain sufficient cooling.  

  Do not obstruct airflow around the 

 

 loudspeaker.

• 

Note  that  the  amplifier  is  not  completely  

 

disconnected from the AC mains service  

 

unless the mains  power  cord  is  removed  

 

from the amplifier or the mains outlet.

Guarantee

This product is guaranteed for a period of two years 
against faults in materials or workmanship. Refer to 
supplier for full sales and guarantee terms.

Compliance to FCC rules

This device complies with part 15 of the FCC Rules. Operation is 
subject to the following conditions: 

•  This device may not cause harmful interference, and
•  This device must accept any interference received, 

including interference that may cause undesired operation. 

Note: This equipment has been tested and found to comply with 
the limits for a Class B digital device, pursuant to part 15 of the 
FCC Rules. These limits are designed to provide reasonable pro-
tection against harmful interference in a residential installation. 
This equipment generates, uses and can radiate radio frequency 
energy and, if not installed and used in accordance with the in-
structions, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not 
occur in a particular installation. If this equipment does cause 
harmful interference to radio or television reception, which can 
be determined by turning the equipment off and on, the user is 
encouraged to try to correct the interference by one or more of 
the following measures: 

•  Reorient or relocate the receiving antenna. 
•  Increase the separation between the equipment and 

receiver. 

•  Connect the equipment into an outlet on a circuit different 

from that to which the receiver is connected. 

•  Consult the dealer or an experienced radio/TV technician 

for help.
 
Modifications not expressly approved by the manufacturer 

could void the user’s authority to operate the equipment under 
FCC rules.

Содержание 4020BMM

Страница 1: ...4020B Operating Manual ...

Страница 2: ...e loudspeakers and the signal source have been switched off The power switch of the 4020B is located on the back panel see Figure 3 Connect the loudspeaker to an earthed mains connection with the supplied mains cable Never connect the loudspeaker to an un earthed mains supply or using an unearthed mains cable Audio input is via a 10 kOhm balanced con nector The connector also has two pins for 12 V...

Страница 3: ... Off An acoustic measuring system such as WinMLS or comparable is recom mended for analyzing the effects of the adjust ments however careful listening with suitable test recordings can also lead to good results if a test system is not available Table 1 shows some examples of typical settings in various situations Figure 4 shows the effect of the controls on the anechoic response Treble Tilt The Tr...

Страница 4: ... walls cabinets etc can cause unwanted colouration blurring of the sound im age These can be minimised by placing the loud speaker clear of reflective surfaces Minimum clearances Sufficient clearance for cooling of the amplifier and functioning of the reflex port must be ensured if the loudspeaker is installed in a restricted space such as a cabinet or integrated into a wall struc ture The surroun...

Страница 5: ...tee This product is guaranteed for a period of two years against faults in materials or workmanship Refer to supplier for full sales and guarantee terms Compliance to FCC rules This device complies with part 15 of the FCC Rules Operation is subject to the following conditions This device may not cause harmful interference and This device must accept any interference received including interference...

Страница 6: ... 100 200 500 1k 2k 5k 10k Hz Genelec Oy 4020 dBr vs freq Hz 7 Nov 12 70 65 0 60 15 30 45 Figure 4 The curves show the effect of the Bass Tilt Treble Tilt and Bass Roll Off controls on the free field response of the 4020B Figure 5 The upper curve group shows the horizontal directiv ity characteristics of the 4020B measured at 1 m The lower curve shows the system s power response ...

Страница 7: ...____________ Maximum peak acoustic output per pair on top of console 1 m distance with music material 105 dB _____________________________________________ Self generated noise level in free field 1m on axis 10 dB A weighted _____________________________________________ Harmonic distortion at 85 dB SPL 1m on axis Freq 50 100 Hz 3 100 Hz 0 5 _____________________________________________ Drivers Bass...

Страница 8: ......

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