Desktop Low Frequency Control; Bass Tilt Control; Treble Tilt Control; Maintenance - Genelec 8050B Operating Manual

Speaker Mounting Position
Flat anechoic response
Free standing in a damped
room
Free standing in a
reverberant room
Near field on a reflective
surface
In a corner
Table 1. Suggested tone control settings in some typical situations
292-8040T-6
Figure 5. The Iso-Pod™ can also be attached to the side of the enclosure for
horizontal mounting.

Desktop low frequency control

The desktop low frequency control (fifth
switch of first switch group from the left)
attenuates the bass frequencies around
160 Hz by 4 dB (see figures 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) offer 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
effects of the adjustments, however, care-
4
Treble tilt Bass tilt Bass roll-off
None None None
None -2 dB None
None -4 dB None
None -2 dB None
None -4 dB -4 dB
292-8040W
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 effect 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 different combinations of settings to find
the best frequency balance.

Maintenance

No user serviceable parts are to be found
within the loudspeaker cabinet or the ampli-
fier unit. Any maintenance or repair of the
loudspeaker should only be undertaken by
qualified 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:
Desktop LF
None
None
None
-4 dB
None
Figure 4. K&M type wall mount
Figure 6. Carrying bag for a pair of 8040B loudspeakers.
•
only be performed by qualified service
personnel. The loudspeaker must not be
opened.
•
unearthed mains cable as this may lead
to personal injury.
•
expose the unit to water or moisture. Do
not place any objects filled with liquid, such
as vases on the loudspeaker or near it.
•
completely disconnected from the AC
mains service unless the mains power
cord is removed from the amplifier or the
mains outlet.
•
loudspeaker
is necessary to maintain sufficient
cooling. Do not obstruct airflow around
the loudspeakers.
•
water or moisture. Do not place any
objects filled with liquid, such as vases
on the loudspeaker or near it.
Genelec 8040B and 8050B loudspeakers are
capable of producing sound pressure levels
in excess of 85 dB, which may cause perma-
nent hearing damage.
Servicing and adjustment must
Do not use this product with an
To prevent fire or electric shock, do not
Note that the amplifier is not
Free flow of air behind the
Do not expose the loudspeaker to
WARNING!