background image

2

General

The bi-amplified Genelec 4020B is an extremely 
compact two way active loudspeaker designed for 
fixed installations. As an active loudspeaker, it con-
tains drivers, power amplifiers, active crossover fil-
ters and protection circuitry. The 4020B is designed 
for indoor use only, in temperatures between 15 to 
35 degrees Celsius and relative humidity between 
20 % and 90 %. 

The MDE™ (Minimum Diffraction Enclosure™) 

loudspeaker enclosure is made of die-cast alumin-
ium and shaped to reduce edge diffraction. Com-
bined with the advanced Directivity Control Wave-
guide

TM

 (DCW

TM

), this design provides excellent 

frequency balance in difficult acoustic environments.

Positioning the loudspeaker

Each 4020B is supplied with an integrated amplifier 
unit, mains cable, a 5-pin connector for audio signal 
and 12 V trigger voltage, a keyhole type wallmount 
and an operating manual. After unpacking, place the 
loudspeaker in its required listening position, taking 
note of the line of the acoustic axis. The axis should 
be pointed towards the center of the listening area. 

Connections

Before connecting up, ensure that the 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 
trigger voltage for power switching. The current fed 
into the 12 V trigger connection must not exceed 
200 mA. The pin sequence of the connector is 
shown in Figure 2.  

Connect the signal cable and 12 V trigger volt-

age to the 5-pole plug provided with the loud-
speaker and secure the connections by tightening 
the screws on each pole. Push the plug into the 
connector on the loudspeaker.

Never connect the 4020B to the loudspeaker 

outputs of a power amplifier or an integrated am-
plifier or receiver.

Once the connections have been made, the 

loudspeakers are ready to be switched on. 

Autostart And Remote Control

The 4020B is equipped with an Autostart function, 
which automatically turns the amplifier to Standby 
mode if an input signal has not been detected for 
approximately 1 hour. 

The amplifier mode can also be switched by a 

12 V DC trigger type remote control. The remote 

4020B 

Active Loudspeaker

Содержание 4020B

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: ... In Sweden Genelec Sverige Ellipsvägen 10B P O Box 5521 S 141 05 Huddinge Phone 46 8 449 5220 Fax 46 8 708 7071 Email info genelec com In the USA Genelec Inc 7 Tech Circle Natick MA 01760 USA Phone 1 508 652 0900 Fax 1 508 652 0909 Email genelec usa genelec com In China Beijing Genelec Audio Co Ltd Jianwai SOHO Tower 12 Room 2605 D 1504 Chaoyang District Beijing 100022 China Phone 86 10 8580 2180 ...

Отзывы: