Genelec 4040A Manual

Genelec Skærm 4040A

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Genelec 4040A

Active Loudspeaker

Operating Manual

4040A

General

The bi-ampliﬁed Genelec 4040A is a power-

ful but compact two way active loudspeaker

designed for ﬁxed installations. As an active

loudspeaker, it contains drivers, power ampli-

ﬁers, active crossover ﬁlters and protection

circuitry. The 4040A 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 Enclo-

sure™) loudspeaker enclosure is made

of die-cast aluminium and shaped to

reduce edge diffraction. Combined with the

advanced Directivity Control WaveguideTM

(DCWTM), this design provides excellent fre-

quency balance in difﬁcult acoustic environ-

ments.

Positioning The Loudspeaker

Each 4040A is supplied with an integrated

ampliﬁer unit, mains cable, a 5-pin connec-

tor for audio signal and 12 V trigger voltage,

a keyhole type wallmount and an operating

manual. After unpacking, place the loud-

speaker 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 loud-

speakers and the signal source have been

switched off. The power switch of the 4040A

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 unearthed mains supply or using an

unearthed mains cable. Audio input is via

a 10 kOhm balanced Phoenix connec-

tor. The connector also has two pins for 12

V trigger voltage for power switching. The

pin sequence of the connector is shown in

Figure 2.

Connect the signal cable and 12 V trigger

voltage to the 5-pole plug provided with the

loudspeaker and secure the connections by

tightening the screws on each pole. Push the

plug into the connector on the loudspeaker.

Never connect the 4040A to the loud-

speaker outputs of a power ampliﬁer or an

integrated ampliﬁer or receiver.

Once the connections have been made,

the loudspeaker is ready to be switched on.

Controls

Level Control

The input sensitivity of the loudspeaker can

be matched to the output of the signal source

by adjusting the rotary level control on the

rear panel.

Autostart Sensitivity

This control sets the triggering sensitivity of

the signal sensing Autostart function. In case

of a high background noise level in the audio

network, the automatic shutoff may not func-

tion as the circuit detects the noise and mis-

interprets it as a valid signal. Switching the

“Autostart Sensitivity” switch to “ON” reduces

the triggering sensitivity and gives better

immunity to noise in the signal network. On

the other hand, if a very low playback level

is desirable, the Autostart function works

better in the more sensitive “OFF” setting.

The required triggering voltages are approxi-

mately 0.4 mV (OFF) and 1.4 mV (ON).

Autostart Off Time

This control sets the shutoff delay of the

Autostart function. When the switch is set to

“OFF”, the loudspeaker shuts off one hour

after ending the playback. In the “ON” setting,

the delay is 15 minutes.

Led Off

This switch turns off the green power indica-

tor LED. However, the overload indication by

red coloured LED remains active.

Tone Controls

The frequency response of the Genelec

4040A can be adjusted to match the acous-

tic environment by setting the tone control

switches on the rear panel. The controls

are “Bass Roll-Off”, “Bass Tilt” and “Treble

Tilt”. An acoustic measuring system is rec-

ommended for analyzing the effects of the

adjustments, 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 frequency

response.

Bass Roll-Off

The Bass Roll-Off control (switches 1 to 3

in switch group 1) affects the low frequency

roll-off of the loudspeaker and attenuates its

energy output near the cut-off frequency (55

Hz). Attenuation levels of -2, -4 or -6 dB can

be selected.

Bass Tilt

The Bass Tilt control (switches 2 to 4 in

switch group 2) offers three attenuation levels

for the bass response of the loudspeaker

below 800 Hz, usually necessary when the

loudspeaker is placed near a wall or other

room boundaries. The attenuation levels are

-2 dB (switch 3 “ON”), -4 dB (switch 4 “ON”)

and -6 dB (both switches “ON”).

Treble Tilt

The Treble Tilt control (switches 2 to 4 in

switch group 3) adjusts the treble response

of the loudspeaker at frequencies above 4

kHz. Two attenuation levels, -2 dB (switch 3

“ON”) or -4 dB (switch 2 “ON”) are available

for smoothening down an excessively bright

sounding system, while the +2 dB setting

(switch 4 “ON”) provides slightly increased

treble level suitable for heavily damped sur-

roundings.

The factory setting for all tone controls is

“OFF” to give a flat anechoic frequency

response. Always start adjustment by set-

ting all switches to “OFF” position. Measure

or listen systematically through the different

combinations of settings to ﬁnd the best fre-

quency balance.

ACOUSTIC

AXIS

225 mm

8 7/8”

Figure 1: Location of the acoustic axis

Figure 2: Audio and 12 V trigger

connector pin sequence

Produkt Specifikationer

Mærke:	Genelec
Kategori:	Skærm
Model:	4040A
Vekselstrømsindgangsspænding:	100-240 V
Vekselstrømsindgangsfrekvens:	50-60 Hz
Bredde:	237 mm
Dybde:	223 mm
Højde:	350 mm
Vægt:	9900 g
Produktfarve:	Sort
Udgangseffekt (RMS):	170 W
Anbefalet brug:	Studio
Frekvensområde:	50 - 25000 Hz
Lydtryksniveau (maks.):	109 dB
Forbindelsesteknologi:	Ledningsført
Lyd-output kanaler:	- kanaler
Højttaler, placering:	Floor, Tabletop/bookshelf
Diskanthøjttaler:	Ja
Diskant diameter:	19 mm
Forstærker:	Indbygget
Forstærker klasse:	A/B
Højttaler kabinet:	Refleks