Using toa's digital signal processor – Toa F-122C User Manual
Page 11

11
[System employing no sub-woofer]
[System employing a sub-woofer]
Electronic controller
AC-120
Power amplifier
F-122C
Ch.1
Ch.2
Ch.1
Ch.2
Mixer / preamplifier
F-122C
Mixer / preamplifier
Ch.1
Ch.2
Electronic controller
AC-120
Power amplifier
Ch.1
Ch.2
Low Out
Sub-woofer
F-122C
F-122C
When using TOA's digital signal processor instead of the AC-120, it is recommended that frequency
characteristics be set as shown in the following tables:
Filter characteristics for F-122C (normal mode) (Setting for ordinary applications)
Filter characteristics for F-122C (low-frequency cut mode) (Setting for speech applications or with a subwoofer)
Filter characteristics for sub-woofer
Filter
Frequency
Gain
Q
PEQ
85 Hz
+11.5 dB
2.871
212 Hz
–2.5 dB
0.667
900 Hz
–8 dB
2.871
10 kHz
+8 dB
0.267
HPF
37.5 Hz
–
0.7
12dB/oct.
37.5 Hz
–
0.5
LPF
20 kHz
–
0.7
12dB/oct.
Filter
Frequency
Gain
Q
PEQ
80 Hz
+6.5 dB
1.414
180 Hz
–4.5 dB
0.667
900 Hz
–8 dB
2.871
11.2 kHz
+8 dB
0.267
HPF
45 Hz
–
0.7
12dB/oct.
45 Hz
–
0.5
LPF
20 kHz
–
0.7
12dB/oct.
Filter
Frequency
Gain
Q
PEQ
112 Hz
+2.5 dB
0.667
LPF
100 Hz
–
0.5
12dB/oct.
Note
Set the F-122C's filter characteristic to Low-
Frequency Cut mode when used in combination
with a sub-woofer.
9.2. Using TOA's Digital Signal Processor