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INSTALLATION CONSIDERATIONS
TURN-ON MODES
Automating the turn-on of your SI-1650 is one of the easiest steps when
installing it in a distributed system. However, do not plug the main power
cord into the switched AC outlet of your preamplier or receiver. The high
power design of the SI-1650 requires large amounts of current from its AC
power source. Additionally, it is always recommended to activate the system
preamplier/receiver before turning on your SI-1650 in order to prevent system
“turn-on thumps”.
In order to address these important needs, the SI-1650 has three special turn-
on modes that let you turn the amplier on only when it is needed. Use the
Conguration and Setup Tool to access and select one of these three Turn-On
options.
Important! The Front Panel Power Switch must be in the ON (switch in)
position for any of the three turn-on options to function (refer to page 36
for more information concerning the Front Panel Power Switch).
Constant – The auto turn-on circuitry is off. The front panel master power
switch operates the amplier. In is “On”, Out is “Off”.
Audio Sense – The master switch on the front panel must be in the “On”
position. The amplier is off when there is no audio signal present at any of the
audio inputs, but the sensing circuitry is on. The turn-on sensing circuitry looks
for a tiny amount of audio signal present at any of the audio inputs. If it detects
a signal, all the amplier channels will turn on. Once the audio signal stops, the
sensing circuit waits three minutes, then turns all amplier channels off.
FIGURE 18