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17
INSTALLATION CONSIDERATIONS
Speaker Compatibility
CAUTIO N! Do not use speakers with an impedance of less than 4 ohms with an
unbridged channel. Do not use speakers with an impedance of less than 8 ohms
with a bridged channel.
An unbridged channel of the SI-1230 is designed to play into a speaker load of
four ohms or more. When a four ohm speaker is connected, the continuous
power rating of the amplifier increases to 37 watts RMS per channel, (all chan-
nels driven). If the load is less than four ohms the protection circuits may operate
and shut off the channel at higher volume levels.
A bridged channel requires that the load be eight ohms or more to deliver 80
watts RMS. If the load is less than 8 ohms the protection circuits may operate and
shut off the channel at higher volume levels.
When designing your system try to specify four to eight ohm speakers (Niles offers a
complete line of architectural loudspeakers with several models rated at 8 ohms).
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