Mounting Considerations; Minimum Clearances; Mounting Options - Genelec 4020C Operating Manual

Loudspeaker Mounting Position
Flat anechoic response
Free standing in a damped room
Free standing in a reverberant room
Near field or desktop
Near to a wall
Table 1: Suggested tone control settings for differing acoustical environments
The attenuation levels are -2 dB (switch 4 "ON"),
-4 dB (switch 5 "ON") and -6 dB (both switches
"ON").
Bass Roll-Off
Bass Roll-Off (switch 3) activates a -4 dB filter to
the lowest bass frequencies (65 Hz). This can be
used for compensating excessively heavy bass re-
production typically caused by loudspeaker place-
ment near room boundaries.
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
frequency balance.

Mounting considerations

Align the loudspeakers correctly
Always place the loudspeakers so that their
acoustic axes (see figure 1) are aimed towards
the center of the listening area. Only vertical
placement is preferred, as it minimises acousti-
cal cancellation problems around the crossover
frequency.
4
Treble Tilt Bass Tilt
OFF
OFF
OFF -2 dB
OFF -4 dB
OFF -6 dB
Minimise reflections
Acoustic reflections from objects close to the
loudspeakers like walls, cabinets etc. can cause
unwanted colouration or blurring of the sound im-
age. These can be minimised by placing the loud-
speaker clear of reflective surfaces.

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 sur-
roundings of the loudspeaker must always be open
to the listening room with a minimum clearance of 3
centimeters (1 / ") behind, above and on both sides
3
16
of the loudspeaker. The space adjacent to the ampli-
fier 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 4020C offers several mounting op-
tions: On the base of the loudspeaker is a 3/8"
UNC threaded hole compatible with a standard
microphone stand. On the rear there are two
M6x10 mm threaded holes for Omnimount
Bass Roll-Off
OFF OFF
OFF OFF
OFF
OFF
OFF
®
size