Genelec 8050BPM Users Manual
8040B
8050B
Operating Manual 2-6
Käyttöohje 7-11
Genelec 8040B and 8050B Active Monitoring Systems
System
The GENELEC 8040B and 8050B 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 monitoring, mobile vans, broadcast and TV control
rooms, surround sound systems and home
studios. Designed as active loudspeakers, they contain drivers, power amplifiers,
active crossover filters and protection circuitry. The Minimum Diffraction Enclosure™
(MDE™) and advanced Directivity Control
Waveguide™ (DCW™) technologies provide
excellent frequency balance even in difficult
acoustic environments.
Drivers
The bass driver dimensions are 165 mm (6
1/2”) and 205 mm (8”) for 8040B and 8050B
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 8040B and
a 25 mm (1”) metal dome on the 8050B. Both
drivers are magnetically shielded.
Crossover
The active crossover network consists of two
parallel bandpass filters. The crossover frequency is 3.0 kHz on the 8040B and 1.8 kHz
on the 8050B. The active crossover controls
(“treble tilt”, “desktop low frequency”, “bass tilt”
and “bass roll-off”) allow precise matching of
the loudspeakers to any room environment.
Amplifiers
The amplifier unit is mounted in the rear of the
loudspeaker enclosure. The unit incorporates
special circuitry for driver thermal overload
protection. Variable input sensitivity allows
accurate level matching to console output
section.
Connections
Each loudspeaker is supplied with a mains
cable and an operating manual. Before connecting 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 placement 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 centerline.
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.
2
Cable
REFLEX PORT
> 0,7 m
WARNING
ELECTRICSHOCKHAZARD. DONOT OPEN.DONOTSUBJECTTOWATEROR
MOISTURE.NOUSER SERVICEABLEPART SINSIDE. REFER SERVICINGTOQUALIFIED
PERSONNEL.USEEARTHEDMAINSCONNECTION ONLY.NOTE!THISMONITO R
SHOULDNOTBEMOUNTED ONAMICROPHONESTANDASTHEBASE THREADISM10.
AVERTISSEMENT
RISQUEDECHOC ÉLECTRIQUE.NE PASOUVRIR. NEPAS EXPOSERÀL'EAUOU
L'HUMIDITÉ.AUCUNCOMPOSANTÀL'INTÉRIEURREMPLAÇABLEPA RL'UTILISATEUR.
ADRESSERTOUTERÉPARATIONÀUNPERSONNELQUALIFIÉ.CETAPPAREILDOIT
ÊTRERACCORDÉÀLATERRE. NOTE!CEMONITEURNE DOITPASÊTREMONTÉ
SURUNPIEDDEMICROPHONECARLE PASDEVISESTDETYPE M10.
+2
0
-2
-4
-6
dB
20Hz 160Hz
DESKTOP
CONTROL
BASS
ROLL-OFF
MAINSINPUT
50/60Hz110W 230 V~
SERIALNUMBER
LAITEONLIITETTÄVÄSUOJAMAADOITUSKOSKETTIMILLAVARUSTETTUUN
PISTORASIAAN.APPARATETMÅ TILKOPLESJORDETSTIKKONTAKT.
APPARATENSKALLANSLUTAS TILLJORDATUTTAG.
ALLOFF
BASS
TILT
TREBLE
ISS
TILT
DISABLE
800Hz
4kHz 20kHz
BASS
ROLL-OFF
0
+2
DESKTOP
CONTROL
+4
+6
dBu
OFFON
8040B BI-AMPLIFIED
MONITORING SYSTEM
MAGNETICALLYSHIELDED
www.genelec.com
MADEIN FINLAND
292-8040W
TREBLETILTBASSTILT
-2
INPUTSENSITIVITY
REQUIREDFOR
-4
100dBSPL@1m
-6
2
1
3
+ -GND
292-8040T-6
Figure 1. Amplifier panel layout of the 8040B
Minimum clearances
Sufficient cooling for 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 structure. The surroundings of the
loudspeaker must always be open to the listening room with a minimum clearance of
5 centimeters (2”) behind, above and on both
sides of the loudspeaker. The space adjacent to the amplifier must either be ventilated
or sufficiently large to dissipate heat so that
the ambient temperature does not rise above
35 degrees Celsius (95°F).
Mounting options
The vibration insulating Isolation Positioner/
Decoupler™ (Iso-Pod™) table stand allows
tilting of the loudspeaker for correct alignment of the acoustic axis. The stand can be
attached to three mounting points allowing
vertical and symmetrical horizontal positioning (see figures 1 and 5).
Genelec 8040B and 8050B can be fitted
to Omnimount® Series 30 (8040B) and 60
(8050B) and König & Meyer loudspeaker
mounts on two sets of M6x10 mm threaded
holes on the back of the enclosure. On the
THREADS FOR
CEILING AND
WALL MOUNTS
TONE CONTROLS
Figure 2. Location of the acoustic axis
8040B: h=240 mm
8050B: h=290 mm
CONNECTOR PANEL
(HORIZONTAL)
Iso-Pod™TABLE
STAND
Figure 3. RCA to XLR cable
base of the enclosure is an M10x10 mm
threaded hole which can be used for securing the loudspeaker to its base. Do not use
this thread for mounting the loudspeaker on
a microphone stand which has a 3/8” UNC
thread.
Setting the input sensitivity
The input sensitivity of the loudspeakers
can be matched to the output of the mixing
console, or other source, by adjusting the
input sensitivity control on the rear panel
(see figure 1). A screwdriver is needed for the
adjustment. The manufacturer’s default setting for this control is -6 dBu (fully clockwise)
which gives an SPL of 100 dB @1m with
-6 dBu input level.
ISSTM autostart function
When the power switch on the loudspeaker is
set to “ON”, the Intelligent Signal SensingTM
(ISSTM) autostart function of the loudspeaker
is active. Automatic powering down to standby
mode happens after a certain time when playback has ended. The power consumption in
standby mode is typically less than 0.5 watts.
The playback will automatically resume once
an input signal is detected from the source.
There is a slight delay in the automatic
ACOUSTIC
AXIS
XLR
(Speaker)
RCA
(Source)
h
Screen
powering up. If this is undesirable, the ISSTM
function can be disabled by setting the “ISS
DISABLE” switch on the back panel to “ON”
position. In this mode, the monitor is powered
on and off using the power switch on the back
panel.
Setting the tone controls
The frequency response of the system may
also have to be adjusted to match the acoustic environment. The adjustment is carried out
by setting the three tone control switch groups
“treble tilt”, “bass tilt” and “bass roll-off” on
the rear panel of the amplifier. There is also
a special “desktop low frequency” tone control
which gives an attenuation of 4 dB at 160 Hz
to compensate the effect of a mixing console,
desk or other reflective surface between the
listener and the loudspeaker. The factory settings for these controls are all “OFF” to give a
flat anechoic response.
Bass roll-off control
Bass roll-off (first switch group from the left)
affects the low frequency roll-off of the loudspeaker and attenuates its energy output near
the cut-off frequency. Attenuation levels of -2,
-4 or -6 dB can be selected.
3
Speaker Mounting Position Treble tilt Bass tilt Bass roll-off Desktop LF
Flat anechoic response
Free standing in a damped
room
Free standing in a
reverberant room
Near field on a reflective
surface
In a corner
None None None None
None -2 dB None None
None -4 dB None None
None -2 dB None -4 dB
None -4 dB -4 dB None
Table 1. Suggested tone control settings in some typical situations
+2
dB
-2
-4
-6
0
20Hz 160Hz
ROLL-OFF
BASS
MAINSINPUT
50/60Hz110 W230V~
DESKTOP
CONTROL
SERIALNUMBER
BASS
TILT
L'UTILISATEUR.ADRESSERTOUTERÉPARATIONÀUNPERSONNELQUALIFIÉ.
NOTE!CEMONITEURNEDOITPASÊTREMONTÉSURUNPIEDDEMICROPHONE
L'HUMIDITÉ.AUCUNCOMPOSANTÀL'INTÉRIEURREMPLAÇABLEPAR
RISQUEDECHOC ÉLECTRIQUE.NEPASOUVRIR.NEPASEXPOSERÀL'EAUOU
ELECTRICSHOCKHAZARD.DONOTOPEN.DO NOTSUBJECTTOWATEROR
NOTE!THISMONITORSHOULDNOTBEMOUNTEDONAMICROPHONESTANDAS
MOISTURE.NOUSERSERVICEABLEPARTSINSIDE.REFERSERVICINGTO
CARLEPASDEVISESTDETYPEM10.
CETAPPAREILDOITÊTRERACCORDÉÀLATERRE.
QUALIFIEDPERSONNEL.USEEARTHEDMAINSCONNECTIONONLY.
4kHz 20kHz800Hz
TREBLE
TILT
ALLOFF
ON
ISS
DISABLE
8040B
BASS
ROLL-OFF
MAGNETICALLYSHIELDED
MADEIN FINLAND
MONITORINGSYSTEM
OFF
DESKTOP
CONTROL
BI-AMPLIFIED
+4
+6
+2
dBu
www.genelec.com
0
-6
-2
-4
TREBLETILTBASSTILT
100dBSPL@1m
INPUTSENSITIVITY
REQUIREDFOR
+ - GND
2
3
1
292-8040T-6
THEBASETHREADISM10.
AVERTISSEMENT
WARNING
292-8040W
Figure 4. K&M type wall mount
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.
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 anechoic
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.
Bass tilt control
Measure or listen systematically through
the different combinations of settings to find
The bass tilt control switches (second switch
the best frequency balance.
group from the left) offer three attenuation
levels for the bass response below 800 Hz,
usually necessary when the loudspeakers are placed near room boundaries. The
attenuation levels are -2 dB, -4 dB and
-6 dB.
No user serviceable parts are to be found
within the loudspeaker cabinet or the amplifier
unit. Any maintenance or repair of the loudspeaker should only be undertaken by quali-
Maintenance
fied service personnel.
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
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
Figure 6. Carrying bag for a pair of 8040B loudspeakers.
only be performed by qualified 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 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.
• Do not expose the loudspeaker to
water or moisture. Do not place any
objects filled 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 permanent
hearing damage.
4
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