Polk Audio DB5252 5-1/4" 2-Way Component Speaker System for Car & Marine The Polk Audio DB5252 2-Way Speaker features a 5-1/4" polypropylene woofer cone and a separate 3/4" silk dome tweeter with external crossover to deliver smooth and precise sound. The speakers' Dynamic Balance technology uses laser imaging to reduce resonance. This DB Series speaker is versatile, with mounting hardware and included mounting cups that offer surface or flush mounting options to the tweeter. The included grilles have a bold design that adds a touch of style to your vehicle's interior, making them a good choice for customized installation. Polk Audio tests the DB marine speakers rigorously for environmental effects like sun, moisture, and extreme temperature changes. As a result, they're even certified for marine applications, making them a great choice for your boat. Polk Audio's DB Series subwoofers are a great value, delivering smooth, powerful bass. So, if you want to upgrade your sound system without breaking the bank, the DB series speakers are an excellent option. Polk's advanced technology and engineering bring out the best in class audio with powerful speaker series, smart speakers, and soundbars, allowing you to sit back, relax and listen with your heart.