4
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-
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:
• Servicing and adjustment must
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 perma-
nent hearing damage.
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
-2 dB
None
None
Free standing in a
reverberant room
None
-4 dB
None
None
Near field on a reflective
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
MAIN
SI
NPUT
50
/6
0H
z1
10
W2
30
V~
BAS
S
ROLL-OF
F
20Hz
160H
z
MAGNETICALLY
SHIELDED
BI-AMPLIFIED
MONITORING
SYSTEM
MADE
IN
FINLAN
D
SERIAL
NUMBER
ON
4k
Hz
20kH
z
800H
z
DESKTO
P
CONTRO
L
OF
F
+
-
GN
D
3
www.genelec.co
m
292-8040T-6
IN
PU
TS
ENSI
TIVITY
REQUIRED
FO
R
100d
BS
PL
@1
m
2
-6
-4
+6
dB
u
+4
1
WARNIN
G
AVERTISSEMENT
NOTE
!T
HI
SM
ON
ITOR
SHOULD
NO
TB
EM
OU
NTED
ON
AM
ICROPHON
ES
TAND
AS
ELECTRIC
SHOC
KH
AZARD.
DO
NO
TO
PEN.
DO
NO
TS
UBJECT
TO
WATE
RO
R
QUALIFIE
DP
ERSONNEL
.U
SE
EARTHED
MAIN
SC
ONNECTIO
NO
NLY.
MOISTURE
.N
OU
SER
SERVICEABLE
PARTS
INSIDE
.R
EFER
SERVICING
TO
CA
RL
EP
AS
DE
VI
SE
ST
DE
TYPE
M10.
CE
TA
PPAREI
LD
OI
TÊ
TR
ER
ACCORD
ÉÀ
LA
TERRE.
L'UTILISATEUR.
ADRESSER
TOUT
ER
ÉPARATIO
NÀ
UN
PERSONNE
LQ
UALIFIÉ.
L'HUMIDITÉ
.A
UCUN
COMPOSAN
TÀ
L'
INTÉRIEU
RR
EMPLAÇABLE
PAR
NOTE
!C
EM
ON
ITEU
RN
ED
OI
TP
AS
ÊTRE
MONT
ÉS
UR
UN
PIED
DE
MICR
OP
HONE
RISQUE
DE
CHOC
ÉLECTRIQUE
.N
E
PAS
OU
VRIR
.N
EP
AS
EXPOSER
ÀL
'EAU
OU
TH
EB
AS
ET
HREA
DI
SM
10
.
292-8040W
AL
LO
FF
TREBLE
TILT
BASS
TILT
BASS
ROLL-OFF
DESKT
OP
CONTROL
IS
S
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
