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3
Operating Multiple Speakers
Because it is very stable, multiple pairs of speakers can be connected directly
to the amplifier's outputs
(see Diagram #2)
as long as the total impedance
presented to the amplifier does not drop below 2.67 ohms. As an example,
3 pairs of 8 ohm speakers could be connected. If excessive demands are
placed on the amplifier the protection circuitry may be engaged, temporarily
shutting down the amplifier.
When speakers are connected directly to the amplifier they will all play at the
same time. If you wish to control speaker pairs independently of each other
we recommend that you use one of SpeakerCraft's multi-room speaker selec-
tors. Depending on the model, up to eight pairs of speakers can be turned
on or off independently of each other, while providing protection to your
amplifier at the same time. Your SpeakerCraft dealer can provide you with
details on the selectors available.
Select the Power Mode Selection
Refer to the Power Mode Selection area under installation considerations to
determine which setting to use to turn the amplifier on. Once you have
determined which mode you will be using set the switches as outlined in the
following chart.
Control Output
The 12V output jack on the back of the amplifier can be used to turn on a
variety of components equipped to be activated when they receive a 12V DC
output. Voltage is only delivered to the jack when the amplifier is "on" or
active. When the amplifier turns off the voltage ceases.
Before connecting another device to the 12 output please make sure that the
device can accept 12V DC at 150ma. To connect the output to another
device you must access the output jack with a two-conductor plug that fits
into the 3.5mm jack. Be aware that the tip of the plug will be (+). If you are
unsure about using this feature please contact an authorized SpeakerCraft
dealer for assistance.
Constant
Will light up when
the amplifier is
“On/Active” and will
go off when it is “off”
Switch Settings
Active Light
Power Mode Selection = Set to
“Constant”
Master Power Button = Push to
“In” position to turn amplifier “On”,
out position is “Off”
Selection
Mode
Trigger
Will light up only
when the amplifier
receives an audio sig-
nal to the main
inputs indicating the
amplifier is
“ON”/active. Will turn
off three minutes
after the signal has
stopped.
Power Mode Selection = Set to
“Trigger”
Master Power Button = Leave in
the “On” position (Button in).
Audio
Sense
Will light up only
when the amplifier
receives a voltage
indicating the amplifi-
er is “On/Active”.Will
turn off once the
voltage has stopped.
Power Mode Selection = Set to
“Audio Sense”
Master Power Button = Leave in
the “On” position (Button in).
3.5mm mini plug jack
Mode Switch
Power Mode Selection
AUDIO SENSE
3-30V A/C D/C
TRIGGER
INPUT
3-30V A/C D/C
TRIGGER
INPUT
CONSTANT
Diagram#1
Installation
Operating Multiple Speakers