Maxim III
installation of speakers
The IMA-520 (and IMA-524) has two channels of amplified audio, rated for a minimum 4-ohm
speaker load. There are two blue Phoenix style speaker connectors on the back panel, each
providing two pairs of speaker terminals. The top connector provides connection to both
channels as does the bottom connector. Each is wired in parallel to the other as shown
below. These are the acceptable wiring methods.
SP-628 ceiling speakers
Channel A
Max 2, 8-ohm speakers in parallel
A1
B1
MAX 2 8Ω SPEAKERS /AMP
MIN 4Ω /AMP
POWER 25W/AMP @4Ω
B2
A2
Home run
-
+
+
+ -
A1
B1
MAX 2 8Ω SPEAKERS /AMP
MIN 4Ω /AMP
POWER 25W/AMP @4Ω
B2
A2
- +
+
-
-
7
7
4
installation
Channel B
Max 2, 8-ohm speakers in parallel
P
AGE MUTE
PAGE PASS
THROUGH TO
SPKR TERMINALS
A1 &/OR B1
F
IRE ALARM
M
UTE INPUT
0.1 W
1 W
MUTE
25V
INPUT
DRAW
DRAW
OFF
-
+ -
P
AGE MUTE
PAGE PASS
THROUGH TO
SPKR TERMINALS
A1 &/OR A2
F
IRE ALARM
M
UTE INPUT
0.1 W
1 W
MUTE
25V
INPUT
DRAW
DRAW
OFF
- +
+
Parallel
-
+
+ -
+ -
A1
ANTI-HUM
MAX 2 8Ω SPEAKERS /AMP
MIN 4Ω /AMP
POWER 25W/AMP @4Ω
LEVEL
L
INE
B2
INCORRECT!
A1
ANTI-HUM
MAX 2 8Ω SPEAKERS /AMP
MIN 4Ω /AMP
POWER 25W/AMP @4Ω
LEVEL
L
INE
B2
-
+
+ -
+ -
B1
P
AGE MUTE
PAGE PASS
THROUGH TO
SPKR TERMINALS
A1 &/OR B1
F
IRE ALARM
M
UTE INPUT
0.1 W
1 W
MUTE
25V
INPUT
DRAW
DRAW
OFF
A2
B1
P
AGE MUTE
PAGE PASS
THROUGH TO
SPKR TERMINALS
A1 &/OR A2
F
IRE ALARM
M
UTE INPUT
0.1 W
1 W
MUTE
25V
INPUT
DRAW
DRAW
OFF
A2
Need help?
Do you have a question about the MAXIM III and is the answer not in the manual?