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Whole House Audio
Whole House Audio (distributed audio) systems are audio systems that allow for playback and often control of music throughout an entire home or building. Numerous commercial systems provide this function, or a system can be custom built or homemade.
Whole house audio systems can be classified as: single source-single zone, single source-multiple zone or multiple source-multiple zone.
==Single source, single zone==
These systems distribute the same audio source everywhere—individual rooms must listen to the same audio source. This is the simplest type of system that can be installed. If designed properly, no special equipment is required other than one amplifier and a desired audio source. Care must be taken not to overload the amplifier by keeping the total speaker impedance above the amplifier's rated minimum impedance. This can be done by wiring the speakers in series, as opposed to parallel (though if the impedance is too high, power transfer is inefficient), with impedance-matching transformers, or by using constant-voltage transformers (often, 70 volts). These systems are commonly employed in retail environments and large buildings such as churches, where large, open areas benefit from additional speakers.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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