6 English
excessively heavy bass reproduction typically caused by
loudspeaker placement near room boundaries.
The factory setting for all tone controls is “OFF” to
give a flat anechoic response. Always start adjustment
by setting all switches to “OFF” position. Measure or
listen systematically through the different combinations of
settings to find the best frequency balance.
Mounting considerations
Align the loudspeakers correctly
Always place the loudspeakers so that their acoustic axes
(see figure 1) are aimed towards the listening position.
Vertical placement is preferred, 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 of the sound image. This can be
minimised by placing the loudspeaker clear of reflective
surfaces. For instance, putting the loudspeakers on
stands behind and above the mixing console and tilting
them down to point the acoustic axes to ear level at the
listening position usually gives a better result than placing
the loudspeakers on the meter bridge.
Minimum clearances
Sufficient clearance for cooling of 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 3
centimeters (1
3
/
16
”) 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 Genelec 8020D offers several mounting options: The
Iso-Pod™ (Isolation Positioner/Decoupler™) vibration
insulating table stand allows tilting the loudspeaker for
correct alignment of the acoustic axis. On the base of the
Table 1: Suggested tone control settings for differing acoustical environments
Loudspeaker Mounting Position
Desktop
Treble Tilt
Bass Tilt
Bass Roll-Off
Flat anechoic response
OFF
OFF
OFF
OFF
Free standing in a damped room
OFF
OFF
OFF
OFF
Free standing in a reverberant room
OFF
OFF
-2 dB
OFF
Near field or console bridge
ON
OFF
OFF
OFF
Near to a wall
OFF
OFF
-4 dB
OFF
On a desk
ON
OFF
-2 dB
OFF
