In a posting by 4313B ahead of yours cited there is a link to a white paper "which should answer any pertinent questions posed in this thread ...". (Appropriate frequency response below.)
For music in normal rooms this is sufficient. If you want a home cinama for earth shaking lows you should go with several subs for a better performance - it is quite another shoe.I've wondered for years why anyone would want to spend 15 to 20K for a pair of K2's when bass response is -10db at 35hz.
Not only this but in resolution and clarity too.Although the Be drivers do look like a major advancement in dynamic capabilities - on paper at least.
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Peter