Poly-Planar - 6" 2-Way Coax-Integral Grill Marine Speaker - Pair - White - MA4056W. Part Number:MA4056. MA-4056 is a 6" cone size two-way coaxial speaker. This speaker featured a rugged waterproof design, teflon-coated wires, plastic grills, polypropylene cones, mylar tweeters and plastic frames, to provide years of trouble-free service. Ultra-low magnetic field speakers eliminates the problem of speakers magnets affecting navigation equipment such as compasses and autopilots. Peak power handling capability 80 watts/pair. Features. Ultra-low magnetic field speaker. Ideal replacement speakers for boaters who want to upgrade to waterproof speakers without changing the cutout size. Integral grills allow for simple, one-piece installation. Stainless steel mounting harware included. Available in Black and White. Specifications. Color - White. Frequency response: 55Hz to 20KHz (2 way). SPL: 89dB. Type: 2-way Coaxial. Cone Size: 6" (152mm). Speaker Impedance: 4 ohms. Peak Power: 80W per pair.