28
Teufel
·
LT 7
Cinch Pre Out – Low-end cut-off frequency
Figure:
Low-end cut-off frequency, Set 75.60Hz
Here, you can specify the low-end cut-off fre-
quency. This is the frequency below which the
level drops off for the loudspeakers connected to
the Stereo Output. The frequency value denotes
that point where the level is -3 dB lower than the
average level. This is calculated in reference to
the subwoofer's linear frequency response curve.
The function of a high-pass filter is to split the
audio signal into two signals – a pass-through
signal and an attenuated signal. The point of
separation is defined by the cut-off frequency.
The pass-through signal is not affected by the
filter; this reaches down to the cut-off frequency.
The attenuated signal is filtered according to the
filter order (e.g., +18 dB/oct). The low-end cut-off
frequency (-3 dB point) is the frequency where
the level of the pass-through signal drops by 3 dB
below the average level.
Press “Enter”. The symbol indicates that the new
setting has been applied.
Figure:
Determining the low-end frequency cut-
off value (example: 40 Hz)
Cinch Pre Out – Filter order
Figure:
Filter order, Set 3
rd
order
The filter order specifies the change in level rela-
tive to the frequency, i.e., it indicates the “slope”
of the frequency curve. The filter order at the
Cinch Pre Out denotes the level increase at the low
end of the frequency range, which is used to com-
pensate for the measured frequency curve of the
M 7200 SW THX Select subwoofer.
A first-order filter increases the signal level by
6 decibels per octave (dB/oct). An “octave” is the
point where the frequency is doubled (octave
above) or halved (octave below). Each filter order
increases the slope of the level change by +6 dB:
1
st
order: 6 dB/oct
2
nd
order: 12 dB/oct
3
rd
order: 18 dB/oct
4
th
order: 24 dB/oct
The maximum slope available is +24 dB/oct, i.e., a
4
th
order filter.
Press “Enter”. The symbol indicates that the new
setting has been applied.
Figure:
(Low-end) filter order (e.g., 3
rd
order)
11. Advanced setup options for the M 7200 SW
