The disadvantage of a planar is mostly in the bass/SPL area. They simply don’t have the excursion that a dynamic driver has. So they don’t move as much air. It’s why planar headphone drivers have to be much bigger in surface area to produce “loud”/“impactful” bass. If you look at 2ch speakers, pretty much all of the designs using planars only use them for tweet and mid frequencies. Only Magnepan uses bass panels and they are HUGE.
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