Polk Audio DB1042 10" Dual Voice Coil Subwoofer for Car & Marine The Polk Audio DB1042 DVC 10" Subwoofer Speaker features a rigid polypropylene cone and durable Santoprene surround that can handle big power over the long haul. Plus, its low-profile design allows you to enjoy serious bass without sacrificing space. The sub's dual 4-ohm voice coils offer flexible wiring options, allowing you to safely draw maximum power from your mono amp or connect multiple subs. Match the DB+ sub with a suitable enclosure, and you'll experience impressive bass rarely found in this price range. Polk Audio tests the DB+ marine speakers rigorously for environmental effects like sun, moisture, and extreme temperature changes. As a result, they're 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 subwoofers 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.