The Poly-Planar MA4056 Performance Round Speaker is a two-way coaxial speaker with a 6 in. cone size. This speaker pair features a rugged waterproof design, plastic grills, teflon-coated wires, polypropylene cones, mylar tweeters and plastic frames, to ensure 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/pairPoly-Planar MA4056 Performance Round Speaker Features: Ideal replacement speakers for boaters who want to upgrade to waterproof speakers without changing the cutout size Ultra-low magnetic field speaker Integral grills allow for simple, one-piece installation Stainless steel mounting hardware included 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 Continuous Power: 40W RMS/pair Mounting Depth: 2-9/16" (65mm) Outside Diameter: 7-3/16" (182mm) Cutout Diameter: 5-1/4" (132mm) Weight: 1.55 lbs per speaker