Extron electronics SF 26X User Manual page 10

•
To test the impedance of the entire speaker system, first disconnect the
speaker wires from the amplifier and then measure the impedance from the
disconnected wires, as shown below.
Test Points
Amplifier
ATTENTION: Disconnect the speaker system from the amplifier before
performing this test, otherwise you may damage the test meter.
•
The impedance of the speaker downstream of the one being tested can be
measured while the system is powered on by first disconnecting the captive
screw connector from the speaker being tested and then connecting the test
probes to the outer (LOOP) terminals of the connector, as shown below.
ATTENTION: Be certain to first disconnect the captive screw connector
from the speaker being tested and test the outer (LOOP) terminals,
otherwise you may damage the test meter.
Red Wire (+) from Amplifier
Amplifier
Black Wire (-) from Amplifier
Test Points
Captive Screw
Connector
Impedance Test Points
Red Wire (+) disconnected
from Amplifier
Black Wire (-) disconnected
from Amplifier
Captive Screw
Connector
Impedance Test Points
SF 26X User Guide • Installation
To next speaker
To next speaker
6