Dan, there's nothing novel about speakers with a set of drivers also on the back, as I mentioned as a possibility in a previous post. For example, Definitive Technology has an extensive series of BiPolar speakers. These lead to a more nearly omni-directional output. The new story here is the electronic processing that will be applied to the back speakers, possibly making phase and/or frequency modifications to the signals sent to them.

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Enjoy the music, not the equipment.