Toa F-122C - 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