Minimalistic Design Featuring Luxurious Real-WoodMartinLogan\'s dedicated in-house engineers carefully crafted the Motion Series to create an extremely affordable and compact product line that seamlessly blends our exquisite Folded Motion™ transducers with powerful, compact bass technology. The result is a smooth, refined sound with stunning dynamic range and jaw-dropping clarity.Motion 15 combine high-excursion, black aluminum cone woofers and low-turbulence, rear-firing, bass ports. Motion 15 speakers feature a 5.25-inch driver paired with an advanced Folded Motion tweeter. Motion 15 creates clear, highly dynamic, and precise sound. Premium, five-way binding posts assure a solid connection.