AA-series Audio Amplifiers Manual for DVC-AO Applications —
P/N 52526:B 8/13/2019
19
Wiring Multiple Audio Amplifiers
Amplifying Audio Messages
Typical wiring of two primary AA-100 audio amplifiers without using a backup amplifier:
3.8.3 Two Primary Amplifiers With Backup
Use an AA-30, AA-100 or AA-120 audio amplifier to back up one or more amplifiers. If an amplifier fails, backup amplifier switching
is automatic.
Connect P6 on the backup amplifier to P4 on the first primary amplifier as shown in Figure 3.15. If there are multiple primary amplifiers,
use P5 to feed the P4 connector on successive amplifiers.
Figure 3.15 shows a typical wiring configuration using an AA-120 as a backup amplifier, Figure 3.16 below shows the use of two AA-
30s where one serves as a backup, and Table 3.6 lists the wiring components used.
•
This wiring diagram applies to AA-30, AA-100, and AA-120 audio amplifiers. Connections to plugs P1, P2, P4, P5, P6, P9, and
P10 are identical.
AA
-1
00
-n
ob
acku
pD
VC
AO
.w
mf
DVC-AO Outputs
1, 2, 3, or 4
(See DVC Manual for
details)
2nd AA-100
70V High-level Output
to Speaker Circuit
Control Modules
(e.g. XP6-C, FCM-1)
Cable
75110
Optional
Class A
Audio
Return*
(Low-Level)
Shield
Unamplified
low-level audio
(Twisted-pair, 14-
18 AWG)
1st AA-100
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.
Optional
4-Wire
Supervised
Return
(High-Level)
70V High-level Output
to Speaker Circuit
Control Modules
(e.g. XP6-C, FCM-1)
Optional
4-Wire
Supervised
Return
(High-Level)
Figure 3.14 Wiring Two AA-100’s Without a Backup Amplifier
Item
Supplied with
Part Number
Low-level audio cable
AA-30, AA-100, AA-120
75110
25-volt audio cable
AA-30, AA-100, AA-120
75109
Backup audio Cable
75108
Table 3.6 Wiring Inventory
