4 English
Treble Tilt
Treble Tilt control (switch 1) attenuates the treble
response of the loudspeaker at frequencies above
5 kHz by 2 dB, which can be used for smoothening
down an excessively bright sounding system.
Bass Tilt
Bass Tilt control offers three attenuation levels
for the bass response of the loudspeaker below
2 kHz, usually necessary when the loudspeakers
are placed near a wall or other room boundaries.
The attenuation levels are -2 dB (switch 3 “ON”), -4
dB (switch 4 “ON”) and -6 dB (both switches “ON”).
Bass Roll-Off
Bass Roll-Off (switch 2) activates high-pass filter-
ing at 85 Hz to complement the low-pass filters of
a Genelec 7050B or 7050A subwoofer. This switch
should always be set to “ON” when using the 8020B
with these subwoofers.
The factory setting for all tone controls is “OFF”
to give a flat anechoic response. Always start ad-
justment by setting all switches to “OFF” position.
Measure or listen systematically through the dif-
ferent combinations of settings to find the best fre-
quency 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. Only vertical placement is preferred, as it
minimises acoustical cancellation problems around
the crossover frequency.
Maintain symmetry
Check that the loudspeakers are placed sym-
metrically and at an equal distance from the
listening position. If possible, place the sys-
tem so that the listening position is on the cen-
terline of the room and the loudspeakers are
placed at an equal distance from the centerline.
Minimise reflections
Acoustic reflections from objects close to the loud-
speakers like desks, cabinets, computer moni-
tors etc. can cause unwanted colouration blurring
of the sound image. These can be minimised by
placing the loudspeaker clear of reflective sur-
faces. For instance, putting the loudspeakers on
stands behind and above the mixing console and
tilting them down to point the acoustic axes to ear
Table 1: Suggested tone control settings for differing acoustical environments
Loudspeaker Mounting Position Treble Tilt Bass Tilt Bass Roll-Off
Flat anechoic response OFF OFF OFF
Free standing in a damped room OFF OFF OFF
Free standing in a reverberant room OFF -2 dB OFF
Near field or console bridge OFF -4 dB OFF
Near to a wall OFF -6 dB OFF
With a 7050B subwoofer See above See above ON
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