24
Increasing the Q
LP
value towards 1,33 will
result in stressing the selected cut-off
frequency point F
LP
, i.e. the response curve
receives a boost right at the selected cross-
over/cut-off frequency point F
LP
(see fig. 2).
Therefore increasing the Q
LP
factor value can
be used as a measure to make the subwoofer
sound harder and dryer - evading a possible
‘booming’ tendency of the subwoofer - caused
by selecting a higher lowpass frequency F
LP
.
Subsonic Highpass Q-FACTOR Setting
Q
LP
In general the Q
HP
control should be set
to the center position Q = 0,73.
Again Q-FACTOR CONTROL allows the active
control of the damping Q(uality) of the sloping
filtering/cut-off curve at the desired cross-
over/cut-off frequency point, here the HIGH-
PASS frequency F
HP
(see fig. 3).
Decreasing the Q
HP
value towards 0,50 will
result in a) shifting the cut-off point slightly
upwards and b) decreasing the slope angle of
the filtering/cut-off curve at the desired cross-
over/cut-off frequency point F
HP
(see fig. 3).
Therefore decreasing the Q
HP
factor value can
be used as a measure to ‘clean-up’ and
correct the sound of a subwoofer that other-
wise tends to have an unprecise ‘spongy’ and
‘frayed’ bottom end reproduction.
Increasing the Q
HP
value towards 1,33 will
result in alternating the selected cut-off
frequency point F
HP
, i.e. the response curve
receives a boost right at the selected cross-
over/cut-off frequency point F
HP
(see fig. 3).
I.e. if your subwoofer tends to have a weak
bottom end reproduction, an increased Q
HP
factor value will give you a fuller overall sound
by making your bass system play with a fatter
sound.
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110998 Man XP500.1 RZ (D+UK) 14.10.1998 9:34 Uhr Seite 24
