Enjoy rumbling bass in your car with this MB Quart Formula 6.5-inch speaker. The spider is constructed from natural fiber for flexibility, while heavy-gauge progressive die-stamped steel frames ensure durability and rigidity. This MB Quart Formula 6.5-inch speaker boasts an integrated 6dB internal crossover to provide distortion-free transition from midrange to tweeter frequencies. | Mb Quart | | Formula Series 6.5" 3-Way Car Speakers with Polypropylene Cones (Pair | Black | Best Buy