Poly-Planar Premium Round MA5107 Speakers. These two-way mid power speakers are ideal for high power stereos or mid power amplifiers. They feature powder coated aluminum grills and a power handling capability of 140 watts/pair. Cone size: 7". Features: * Coated internal wiring for long life * Powder Coated Aluminum Grills * Polypropylene cones * Low Magnetic Field does not interfere with compass and autopilot.