These 8.8-inch diameter monsters offer significant performance advantages over our 7.7 inch models, and a huge advantage over conventional 6.5 inch marine coaxials. Used with a subwoofer, they offer vastly better dynamics and mid-bass impact than smaller speakers, making them the best choice when ultimate performance is desired. Although M6-880X Coaxial Systems can be used with as little as 50 W per channel, but for best audio performance we recommend amplifiers capable of between 50-250 W of continuous power per channel. The 1″ treated-silk dome tweeter renders brilliant highs, and true 2-way crossover ensures that the woofer and tweeter work in perfect concert. You’ll hear all the details of your music, even when the throttle is forward and you’re skimming over the waves. You don’t have to worry about mounting the crossovers because they’re attached to the speaker frames.