Datasheet - Kling & Freitag

User's manual
System Amplifier K&F TOPAS
20
FilterType = 'LowP' (Lowpass)
Freq = 1000Hz
10
Power in [dB]
0
-3
-12
Q = 0.707 (default) Butterworth 2.Ordnung
-24
20 50 100 500 1000 5000 10000 20000
Frequency in [Hz]
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.
Linkwitz-
Riley
6th ord.
36 dB/
oct.
36 dB/
oct.
3 1.932 0.707 0.518 -
3 1 1 0.5 -
KLING & FREITAG GMBH © 2012 Revision 3.0 Page 62 of 65