KLING & FREITAG K&F TOPAS - Manual (Page 62)

User's manual System Amplifier K&F TOPAS
KLING & FREITAG GMBH © 2014 Version 3.1 Page 62 of 65
20 50 100 500 1000 5000 10000 20000
-24
-12
-3
0
10
20
Frequency in [Hz]
P
o
w
e
r
in
[
d
B
]
FilterType = 'LowP' (Lowpass) Freq = 1000Hz
Q = 0.707 (default) Butterworth 2.Ordnung
You can choose between a high pass filter 1st or 2nd order. The Q of a 1st order high pass
filter is always fixed. At a 2nd order high pass filter Q is adjustable in steps of 0.001 from 0.2
to 20.
The parameter 'Gain' has no effect with the low pass filters.
Examples of how to set up low pass filters and how many parameteric filters are necessary,
are listed in following table.
Type of
filter Slope Number
of
necessary
PEQs
Q
high- /
low
pass
filter 1
Q
high- /
low
pass
filter 2
Q
high- /
low
pass
filter 3
Q
high- /
low
pass
filter 3
Butterworth
1st ord. 6 dB/
oct.
1 0.707
1st
order
- - -
Butterworth
2nd ord. 12 dB/
oct.
1 0.707
2nd
order
- - -
Linkwitz-
Riley
2nd ord. 12 dB/
oct.
1 0.5 - - -
Butterworth
3rd ord. 18 dB/
oct.
2 1 0.707
1st
order
- -
Butterworth
4th ord. 24 dB/
oct.
2 1.307 0.541 - -
Linkwitz-
Riley
4th ord 24 dB/
oct.
2 0.707
2nd
order
0.707
2nd
order
- -
Butterworth
5th ord. 30 dB/
oct.
3 1.618 0.618 0.707
1st
order
-
Butterworth
6th ord. 36 dB/
oct.
3 1.932 0.707 0.518 -
Linkwitz-
Riley
6th ord. 36 dB/
oct.
3 1 1 0.5 -