There is no set rule on wether biwiring will be sonically beneficial. If Biwiring sounds better to the listners ear, its beneficial. If another listener likes the way it sounds better single wired its not benefical.
You won't really know the overall effect and effects on bass, midrange and highs until you try it and see how it sounds to your ear.
You won't really know the overall effect and effects on bass, midrange and highs until you try it and see how it sounds to your ear.