The NSAW350's two-way acoustic suspension design system incorporates a 6.5" woofer and 1" tweeter in a weather resistant enclosure. The 6.5" high compliance poly propilane mica filled woofer delivers solid reproduction of the lower and middle frequencies. The upper end of the frequency range is handled by Yamaha's 1" PEI dome tweeter. The NSAW350's sealed enclosure with aluminum grill protects the speakers from the elements.