The power and performance delivered by a set of Polk Audio MM651 2-way Coaxial car speakers is the result of a unique combination of internal and external expertise. Within its 6.5-inch (6.75 inches total) stylish black frame are external crossovers that dramatically enhance your car audio experience. Although the MM651 model is advertised as a car speaker, it’s also approved for marine use, giving you the option to take this same crisp, clear control with you while you’re out on the water. You can thank features like the Type Dynamic Balance function and the silk composite weather-resistant dome on the tweeter which gives you the freedom to enjoy the quality expected from Polk Audio no matter where you are. A product of Polk Audio’s MM series of speakers, the MM651 model continues to deliver the expected functions, features, and innovative design users have grown to love, all while being only one of three marine approved models capable of performing on land and water. Additions like minute neodymium magnets allows you to experience the versatility of larger, cumbersome devices packed into its compact 6.5-inch build. This rare earth metal is responsible for offering remarkable strength to performance ratio and saves the speaker from bearing a considerable amount of weight. Other unique favorites like woofer cones constructed from woven honeycomb glass fiber present an uncontested clean, balanced sound. The stiffness to mass ratio is considerably low, leading to faster transients and magnified detail during delivery. Even if you’re rocking around on the water, features like Kippel optimization or 100 watts RMS ensure its ability to produce stable, quality sound. No matter if you intend to use Polk Audio MM651 two-way speakers on a boat or in your vehicle, variations in temperature, extreme humidity, or uncontrolled acoustics won’t cause the speakers to stray from its professional sound quality. Audiophiles are sure to admire the 40-25kHz Overall Frequency Response and continuous 100 watt power handling wrapped within MM651 speakers. Efficiency measures around 94dB and its power handling peaks at 200 watts, proving that a compact car speaker is capable of delivering major sound. Polk Audio ensured that its MM651 2-way speakers are compatible with all factory or aftermarket car stereos. If that wasn’t exciting enough, its 2.7-ohm impedance offers even more power as the icing on the cake. Best of all, the stereos are amazingly lightweight. Unlike heavy subwoofers, this model is constructed with a carbon composite basket similarly structured like wheel spokes, the speaker won’t flex and its amp can handle the bass, no matter how loud you turn up the volume – and they look great in the process. While browsing through your playlist, you’ll be pleased to learn that music can sound so good. Polk Audio went the extra mile by adding large diameter 30-millimeter voice coils in the drivers, making the MM651 pair of speakers even more powerful and reliable than before. The entire MM series was designed to present an unparalleled level of sound quality and a completely flexible fit, suiting the group for almost any application. This level of high performance, professional quality sound is usually reserved for subwoofers and loudspeaker systems.