20
AA-series Audio Amplifiers Manual for DVC-AO Applications —
P/N 52526:B 8/13/2019
Amplifying Audio Messages
Wiring Multiple Audio Amplifiers
Typical wiring of two AA-120s using one AA-120 as a backup:
Typical wiring of two AA-30s using one AA-30 as a backup:
AA-
1
2
0-
w
it
hb
acku
pD
VC
A
O.w
m
f
To Speaker Circuit
Control Modules
(e.g. XP6-C, FCM-1)
Optional
4-Wire
Supervised
Return
(High-Level)
Note: Cables must enter from top of the plug.
*Note:
If not using Class A low-level audio return, an R-470 resistor assembly may be installed across P3, pins 4 and 5 of the last
directly connected device on the low-level audio riser; this may help to calibrate the audio amplifier.
Cable 75108
Cable 75110
Unamplified
low-level audio
(Twisted-pair,
14-18 AWG)
Figure 3.15 Wiring Multiple Audio Amplifiers: One Primary AA-120 With One Backup
DVC-AO Outputs
1, 2, 3, or 4
(See DVC Manual for
details)
Optional
Class A
Audio
Return*
(Low-Level)
1st Primary
AA-30
A
A
-3
0
-w
it
hb
ac
k
u
pD
VCA
O
.w
mf
To Speaker
Circuit Control
Modules inside
cabinet (e.g.
XP6-C, FCM-1)
Cable 75109
Cable
75110
Cable
75110
Cable
75108
Note: Cables must enter from top of the plug.
*Note:
If not using Class A low-level audio return, an R-470 resistor assembly may be installed across P3, pins 4 and 5 of the last directly
connected device on the low-level audio riser; this may help to calibrate the audio amplifier.
Unamplified
low-level audio
(Twisted-pair,
14-18 AWG)
2nd Primary
AA-30
Backup AA-30
To Speaker
Circuit Control
Modules inside
cabinet (e.g.
XP6-C, FCM-1)
Cable 75109
Optional
4-Wire
Supervised
Return
(High-Level)
DVC-AO Outputs
1, 2, 3, or 4
(See DVC Manual for details)
Optional
Class A
Audio
Return*
(Low-Level)
Optional
4-Wire
Supervised
Return
(High-Level)
Cable 75108
Figure 3.16 Wiring Multiple Audio Amplifiers: Two Primary AA-30s With One Backup