HIFONICS ZD-3350.1D MONO BLOCK AMPLIFER. Heat Sink: Aluminum: Modern Design Hifonics Heat sink for Superior Heat Dissipation. Auto Turn-On: DC SIGNAL SENSE: The DC SIGNAL SENSE switch will allow the amp to turn on when a signal is received on the RCA inputs, so an amplifier remote turn on wire is not needed to turn on the amplifier.
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