User's Manual

4
Desktop low frequency control
The desktop low frequency control (fifth
switch of rst switch group from the left)
attenuates the bass frequencies around
160 Hz by 4 dB (see gures 7 and 9). This
feature is designed to compensate for the
boost often occurring at this frequency
range when the loudspeaker is placed upon
a meter bridge, table or similar reflective
surface.
Bass tilt control
The bass tilt control switches (second switch
group from the left) oer three attenuation
levels for the bass response below 800 Hz,
usually necessary when the loudspeak-
ers are placed near room boundaries. The
attenuation levels are -2 dB, -4 dB and
-6 dB.
Treble tilt control
Treble tilt (third switch group from the left)
allows adjusting the treble response above
5 kHz by +2, -2, or -4 dB, which can be used
for correcting an excessively bright or dull
sounding system.
An acoustic measuring system such as
WinMLS is recommended for analyzing the
eects of the adjustments, however, care-
ful listening with suitable test recordings can
also lead to good results if a test system is
not available. Table 1 shows some typical
settings in various situations. Figures 7 and
9 show the eect of the controls on the ane-
choic response.
Always start adjustment by setting all
switches to “OFF” position. Then set only
one switch per group to the “ON” position to
select the desired adjustment. If more than
one switch is set to “ON” (within one switch
group) the attenuation value is not accurate.
Measure or listen systematically through
the dierent combinations of settings to nd
the best frequency balance.
Maintenance
No user serviceable parts are to be found
within the loudspeaker cabinet or the ampli-
er unit. Any maintenance or repair of the
loudspeaker should only be undertaken by
qualied service personnel.
Safety considerations
Although the 8040B and 8050B have been
designed in accordance with international
safety standards, to ensure safe operation
and to maintain the loudspeaker under safe
operating conditions, the following warnings
and cautions must be observed:
• Servicing and adjustment must
only be performed by qualied service
personnel. The loudspeaker must not be
opened.
• Do not use this product with an
unearthed mains cable as this may lead
to personal injury.
• To prevent re or electric shock, do not
expose the unit to water or moisture. Do
not place any objects lled with liquid, such
as vases on the loudspeaker or near it.
• Note that the amplier is not
completely disconnected from the AC
mains service unless the mains power
cord is removed from the amplier or the
mains outlet.
• Free ow of air behind the
loudspeaker
is necessary to maintain sucient
cooling. Do not obstruct airow around
the loudspeakers.
• Do not expose the loudspeaker to
water or moisture. Do not place any
objects lled with liquid, such as vases
on the loudspeaker or near it.
WARNING!
Genelec 8040B and 8050B loudspeakers are
capable of producing sound pressure levels
in excess of 85 dB, which may cause perma-
nent hearing damage.
Table 1. Suggested tone control settings in some typical situations
Speaker Mounting Position Treble tilt Bass tilt Bass roll-o Desktop LF
Flat anechoic response
None None None None
Free standing in a damped
room
None -2 dB None None
Free standing in a
reverberant room
None -4 dB None None
Near eld on a reective
surface
None -2 dB None -4 dB
In a corner
None -4 dB -4 dB None
-4 -6
dB
0
-2
+2
+2
0
-2
BASS
TILT
TREBLE TILT
MAINSINPUT
50 /60Hz110 W230 V~
BASS
ROLL-OFF
20Hz 160Hz
MAGNETICALLY SHIELDED
BI-AMPLIFIED
MONITORING SYSTEM
MADE INFINLAND
SERIAL NUMBER
ON
4kHz 20kHz800Hz
DESKTOP
CONTROL
OFF
+ - GND
3
www.genelec.com
292-8040T-6
INPUTSENSITIVITY
REQUIREDFOR
100dBSPL@1m
2
-6
-4
+6
dBu
+4
1
WARNING
AVERTISSEMENT
NOTE!THISMONITORSHOULDNOTBEMOUNTEDON AMICROPHONESTAND AS
ELECTRICSHOCKHAZARD.DO NOTOPEN.DO NOTSUBJECT TOWATEROR
QUALIFIEDPERSONNEL.USEEARTHEDMAINSCONNECTIONONLY.
MOISTURE.NOUSER SERVICEABLEPARTS INSIDE.REFER SERVICINGTO
CARLEPAS DEVISESTDE TYPEM10. CETAPPAREILDOITÊTRERACCORDÉÀLA TERRE.
L'UTILISATEUR. ADRESSERTOUTERÉPARATIONÀUNPERSONNELQUALIFIÉ.
L'HUMIDITÉ.AUCUNCOMPOSANTÀL'INTÉRIEURREMPLAÇABLEPAR
NOTE!CEMONITEURNEDOITPAS ÊTREMONTÉSURUN PIEDDE MICROPHONE
RISQUE DECHOC ÉLECTRIQUE.NE PASOUVRIR.NEPASEXPOSER ÀL'EAUOU
THEBASETHREADISM10.
292-8040W
ALLOFF
TREBLE TILTBASS TILT
BASS ROLL-OFF
DESKTOP
CONTROL
ISS
DISABLE
8040B
Figure 5. The Iso-Pod™ can also be attached to the side of the enclosure for
horizontal mounting.
Figure 6. Carrying bag for a pair of 8040B loudspeakers.
Figure 4. K&M type wall mount