®

Application 4- Connected Inline with the Outputs of a Mixer

This application is ideal for dedicated feedback suppression on the outputs of a mixing con-

sole. This application provides the user with dual channels of 24 filters of feedback suppres-

sion per output channel of the mixing console.

1. Connect the outputs from the mixer to the inputs of the AFS 224.

2. Connect the outputs of the AFS 224 to the power amps.

3. Apply power to the mixer and amplifiers.

For maximum performance and proper operation, the input signal to the dbx 224 must cause

the “0” dBu LED to light fairly consistently and the “+10” dBu LED to light occasionally.

The input level to the amplifiers may have to be reduced in this situation so that they are not

overdriven by the signal from the 224.

Pan
Mute
-10
0
+5
+10
-20
-30
-∞
-5
L / R
Mute
L / R
Mute
L / R
Mute
L / R
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5
1234
-10
0
+5
+10
-20
-30
-∞
-5
-10
0
+5
+10
-20
-30
-∞
-5
-10
0
+5
+10
-20
-30
-∞
-5
Mute
L / R
5
-10
0
+5
+10
-20
-30
-∞
-5
Mute
L / R
6
-10
0
+5
+10
-20
-30
-∞
-5
Mute
L / R
7
-10
0
+5
+10
-20
-30
-∞
-5
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Mute
L / R
8
-10
0
+5
+10
-20
-30
-∞
-5
Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5 Pan
-5
-4
-3
-2
-10+1
+2
+3
+4
+5
Mute
L / R
-10
0
+5
+10
-20
-30
-∞
-5
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Aux 1
0
2
46
8
10
Aux 2
0
2
46
8
10
Mute
L / R
-10
0
+5
+10
-20
-30
-∞
-5

Output A Output B

Mixer Output to Input

Channel 2

AFS 224

Mixer Output to Input

Channel 1

AFS 224

Output to Power Amp Output to Power Amp

Output to Speaker

Output to Speaker

Applications Guide Operation
AFS 224
10
AFS 224 User Manual