Genelec 4030C, Operating Manual

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4
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 3) activates a -4 dB filter to
the lowest bass frequencies (55 Hz). This can be
used for compensating 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
center of the listening area. Only vertical placement
is preferred, as it minimises acoustical cancellation
problems around the crossover frequency.
Minimise reflections
Acoustic reflections from objects close to the
loudspeakers like walls, cabinets etc. can cause
unwanted colouration blurring of the sound
image. These can be minimised by placing the
loudspeaker 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 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 4030C offers several mounting
options: 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
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 desktop OFF -4 dB OFF
Near to a wall OFF -6 dB OFF