6 JBL Professional Control 300 Series
WIRING INSTRUCTIONS
2.) Using Loop-Through Terminals (Pins 2 & 3)
-- By
connecting the wire pair of the subsequent speaker to pins
2 & 3, then all subsequent speakers will be disconnected
when this speaker’s connector is disconnected during
troubleshooting . This can be useful as a way to isolate
problems to a section of the distributed line while leaving the
wires attached to the connector.
Figure D:
Loop-Through System
Hookup Diagram
Power Amp
+
-
1 2 3 4
Speaker 1
1 2 3 4
Speaker 3
1 2 3 4
Speaker 2
+
-
From Amplifier or
Previous Speaker
+
IN
1
2
-
Loop
Thru
+
-
+
3
4
-
IN
Loop
Thru
+
-
Figure C:
Using Loop-
Through Terminals
To Subsequent
Speakers
Control 227C
Figure B:
Parallel System
Hookup Diagram
Power Amp
+
-
1 2 3 4
Speaker 1
1 2 3 4
Speaker 3
1 2 3 4
Speaker 2
+
-