APart IMPMET [8/12] Installer tools

INSTALLER TOOLS

• Example:youmeasureanimpedanceof250ohms(Z)ina100

voltsystem.Thesystempower=100x100/250=10000/

250 = 40 watts. This speaker or speaker line corresponds to a

40 watts load on a 100 volt power ampliﬁer.

Note: when measuring 100 volt speaker lines, make sure that

all local 100 volt volume controls have been set at max volume.

Disconnect the speaker line from the ampliﬁer before performing

the measurement. Never attempt to measure the impedance on

live systems! This will result in unreliable measurement results and

eventually irreparable damage to the measuring instrument.