Genelec 8040A Bruksanvisning

Genelec högtalare 8040A

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System
The GENELEC 8040A and 8050A are
two way active monitoring loudspeakers
designed to produce high SPL output, low
coloration and broad bandwidth in a small
enclosure size. They are suitable for a wide
variety of tasks, such as near field monitor-
ing, mobile vans, broadcast and TV control
rooms, surround sound systems and home
studios. Designed as active loudspeak-
ers, they contain drivers, power amplifiers,
active crossover filters and protection cir-
cuitry. The Minimum Diffraction Enclosure™
(MDE™) and advanced Directivity Control
Waveguide™ (DCW™) technologies pro-
vide excellent frequency balance even in
difficult acoustic environments.
Drivers
The bass driver dimensions are 165 mm (6
1/2”) and 205 mm (8") for 8040A and 8050A
respectively. The long, flow optimized reflex
tube has a large cross sectional area and
terminates with a wide flare at the back of
the enclosure. The high frequency driver is a
19 mm (3/4”) metal dome on the 8040A and
a 25 mm (1") metal dome on the 8050A. Both
drivers are magnetically shielded.
Crossover
The active crossover network consists of two
parallel bandpass filters. The crossover fre-
quency is 3.0 kHz on the 8040A and 1.8 kHz
on the 8050A. The active crossover controls
("treble tilt", "desktop low frequency", "bass
tilt" and "bass roll-off") allow precise match-
ing of the loudspeakers to any room environ-
ment.
Amplifiers
The amplifier unit is mounted in the rear of
the loudspeaker enclosure. The unit incor-
porates special circuitry for driver thermal
overload protection. Variable input sensitiv-
ity allows accurate level matching to console
output section.
Connections
Each loudspeaker is supplied with a mains
cable and an operating manual. Before con-
necting up, ensure that the mains switch is off
(see figure 1). Audio input is via a 10 kOhm
balanced XLR connector, but unbalanced
leads may be used as long as pin 3 is
grounded to pin 1 of the XLR (see figure 3).
Once the connections have been made, the
loudspeakers are ready to be switched on.
Mounting considerations
Align the loudspeakers correctly
Always place the loudspeakers so that
their acoustic axes (see figure 2) are aimed
towards the listening position. Vertical place-
ment is preferable, as it minimises acoustical
cancellation problems around the crossover
frequency.
Maintain symmetry
Check that the loudspeakers are placed
symmetrically and at an equal distance from
the listening position. If possible, place the
system so that the listening position is on the
centerline of the room and the loudspeakers
are placed at an equal distance from the cen-
terline.
Minimise reflections
Acoustic reflections from objects close to the
loudspeakers like desks, cabinets, computer
monitors etc. can cause unwanted colouration
and blurring of the sound image. These can
be minimised by placing the loudspeaker clear
of reflective surfaces. For instance, putting the
loudspeakers on stands behind and above the
mixing console usually gives a better result
than placing them on the meter bridge.
Genelec 8040A and 8050A Monitoring Systems
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, careful
listening with suitable test recordings can
also lead to good results if a test system is
not available. Table 1 shows some typical set-
tings in various situations. Figures 8 and 10
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 8040A and 8050A 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 qualified service
personnel. The loudspeaker enclosure
must not be opened.
• Do not use this product with an
unearthed mains cable or a mains
connection without the protective earth
contact as this may lead to personal
injury.
• To prevent fire or electric shock, do
not expose the unit to water or moisture.
• Do not place any objects filled with
liquid, such as vases on the loudspeaker
or near it.
• 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.
• Free flow of air behind the
loudspeaker is necessary to maintain
sufficient cooling.
• Do not obstruct airflow around the
loudspeakers.
WARNING!
Genelec 8040A and 8050A loudspeakers are
capable of producing sound pressure levels
in excess of 85 dB, which may cause perma-
nent hearing damage.
Guarantee
Genelec 8040A and 8050A are supplied with
two year guarantee against manufacturing
faults or defects that might alter the perfor-
mance of the loudspeakers. Refer to supplier
for full sales and guarantee terms.
Table 1. Suggested tone control settings in some typical situations
Speaker Mounting Position Treble tilt Bass tilt Bass roll-off Desktop LF
Flat anechoic response None None None None
Free standing in a damped
room
None None None-2 dB
Free standing in a
reverberant room
None None None-4 dB
Near field on a reflective
surface
None None-2 dB -4 dB
In a corner None None-4 dB -4 dB
Figure 4. The Iso-Pod™ can also be attached to the side of the enclosure for
horizontal mounting.
Figure 7. Carrying bag for a pair of 8040A loudspeakers.
Figure 6. K&M type
wall mount
Figure 5. K&M type
ceiling mount
EC Declaration of Conformity
This is to certify that Genelec Monitoring Systems 8040A and 8050A conform to the following standards:
Safety:
IEC 60065:2001 + A1:2005 + A2:2010/EN 60065: 2002 + A1:2006 + A11:2008 + A2:2010 + A12:2011
EMC:
EN 55020:2007
EN 55013:2001 + A1: 2003 + A2: 2006
EN 61000-3-2:2006 + A1:2009 + A2:2006
EN 61000-3-3:2008
The product herewith complies with the requirements of The Low Voltage Directive73/23/EEC, EMC Directive 89/336/EEC and
93/68/EEC
Signed:
Ilpo Martikainen
Position: Managing Director
Date: 5-September-2011
Figure 8. The curves above show the effect of the “bass tilt”,
“treble tilt”, “desktop low frequency” and “bass roll-off” controls
on the free field response of the 8040A.
Figure 9. The upper curve group shows the horizontal directivity
characteristics of the 8040A measured at 1 m. The lower curve shows
the system's power response.
Figure 10. The curves above show the effect of the “bass tilt”,
“treble tilt”, “desktop low frequency” and “bass roll-off” controls
on the free field response of the 8050A
Figure 11. The upper curve group shows the horizontal directivity
characteristics of the 8050A measured at 1 m. The lower curve shows
the system's power response.

Produktspecifikationer

Varumärke: Genelec
Kategori: högtalare
Modell: 8040A

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