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ADVANCED APPLICATION – LARGE AREA, MULTIPLE SPEAKER SYSTEMS
Large areas such as gathering rooms or banquet halls may require more than a single pair of
speakers. Multiple speakers can be connected to the same amplifier channel. This application
requires careful understanding of the amplifiers capabilities.
1) Determine what the minimum speaker impedance the amplifier can handle. This should be
noted on the amplifier or the amplifier’s instruction manual. Typically, most amplifiers can had
a minimum of 4-ohms per speaker channel.
2) The XA and XB series speakers are 6-ohms. By connecting two 6-ohm speakers to one
amplifier channel, a 3-ohm speaker load is created. For amplifiers with a 4-ohm minimum, this
is an improper application that can cause damage to the amplifier.
3) The XA and XB series speakers provide a third wiring post for this type of application. Remove
the yellow plastic cap to expose the “+8” wiring post. Using the “+8” wiring post will make the
XA and XB series speaker 8-ohms. By connecting two 8-ohm speakers to one amplifier
channel, a 4-ohm speaker load is created. For amplifiers with a 4-ohm minimum, this is an
acceptable application.
The figure above shows multiple speakers connected to a single output amplifier channel by using
FIM (flexible impedance matching). To make sure the impedance matches the amplifiers minimum 4-
ohm specification, the “+8” post is used. The yellow cap that was once on the “+8” post is moved to
the “+6” post as an added precaution.
Note: A 6-Ohm load is the optimum load for a single speaker per
channel. The best sound is a result of a single 6-Ohm connection.
Be sure to verify the amplifiers minimum impedance capability.