单项选择题

Whichofthefollowingistherecommendedplacementoftherearsurroundspeakersina5.1surroundinstallation？（）

A.Directlytotheleftandrightandslightlyinfrontofthelistener
B.Directlytotheleftandrightandslightlybehindthelistener
C.Aboveandbehindthelistener
D.Directlybehindthelistener
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单项选择题
Ifthespeakersinaninstallationareoutofphase，thismeansthat（）
A.thesubwooferisatthewrongangle.
B.thefrontandrearspeakersarereversed.
C.thepolarityofthespeakersarereversed.
D.theangleofthespeakersareincorrect.
单项选择题
Whichofthefollowingisthecorrectsignalflowforananalogmulti－roomaudiosystem？（）
A.Source，VolumeControl，Speaker，Amp
B.Source，Amp，VolumeControl，Speaker
C.Amp，Source，VolumeControl，Speaker
D.Speaker，Amp，VolumeControl，Source
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