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This is likely due to the settings on the amplifier being used. For instance my Sony has multiple settings for music that don't use the subwoofer, so I have to select a mode or "sound field" that uses all of the speakers in order to get the sub to turn on. Or on some there are settings specific to the input selected and you may have to go into those and turn on the sub manually (this is not as likely to be the case). I hope that helps.
Sorry, there was a problem. Please try again later.To get 5.1 or 7.2 channels only by and fiber optic
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