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

Page 11

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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