Charming compact box speakers from the US electrostatic specialist 

We don’t see products from MartinLogan very often. In fact, that’s exactly what we said five years ago when we reviewed the original version of the Motion 15s.

The company is best known for its electrostatic speakers but, while the Motion 15is don’t have the benefit of electrostatic drivers, they do use an Air Motion Transfer (AMT) tweeter to give at least a hint of the performance of such.
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https://www.whathifi.com/reviews/martinlogan-motion-15i