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Your best option is to add wireless rear speakers. Yamaha sells a few options that are compatible with the MusicCast 400 system. Yamaha recommends pairing 2 of the MusicCast 20 or 50 speakers to the system for wireless rears. It does add up quickly though.
Sorry, there was a problem. Please try again later.I don't think you can. You can buy the two wireless MusicCast speakers for the rear sound but I doubt it would be the same as a true 4k system but pretty close.
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