{"product_id":"polk-audio-db522-5-1-4in-coaxial-speakers-for-car-marine-use","title":"Polk DB522 5-1\/4in Coaxial Speaker for Car \u0026 Marine - Clear, Durable","description":"\u003cp\u003eIn this review the Polk DB522 5-1\/4in coaxial speaker is judged on clarity, durability, and installation ease for both car and marine use. It is best for drivers and boat owners who want a straightforward upgrade over factory speakers that delivers louder, cleaner sound without complicated tuning. The single biggest reason to buy is the combination of \u003cstrong\u003emarine-certified durability\u003c\/strong\u003e and Polk's Dynamic Balance resonance control, which produces low distortion and wide sound dispersion in cabins and open cockpits.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-purpose design:\u003c\/strong\u003e Built for both car and marine use so one speaker type works for vehicle doors and freshwater boats with confidence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolypropylene woofer cone:\u003c\/strong\u003e The 5-1\/4in cone delivers solid midbass and stays stable in changing temperatures and humidity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4in silk dome tweeter:\u003c\/strong\u003e Smooth high-frequency response gives clear vocals and cymbals without harshness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in crossover:\u003c\/strong\u003e Directs highs and lows to the right drivers for balanced output and better imaging from a single coaxial assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP56 splash-proof protection:\u003c\/strong\u003e Coated baskets and salt-fog tested construction make these speakers suitable for freshwater marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Includes mounting hardware and stylish grilles that simplify fitting into factory openings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe DB522 is aimed at car owners, motorcyclists, ATV riders, and boat owners who want a clear improvement over stock speakers with minimal fuss; customers who value durable, splash-resistant components will appreciate the marine certification and coated hardware. It suits people doing a direct replacement in standard 5-1\/4in locations who want louder, more detailed sound without adding crossovers or custom enclosures.\u003c\/p\u003e\n\u003cp\u003eThis is not for someone seeking deep, subwoofer-level bass from a single speaker or those who need fully weatherproof offshore-rated transducers; for very large boats or audiophile-level component systems, a dedicated component set and separate woofers would be a better fit.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClear, low-distortion sound thanks to \u003cstrong\u003eDynamic Balance\u003c\/strong\u003e material selection and design.\u003c\/li\u003e\n\u003cli\u003eMarine certification and coated baskets let these speakers handle humidity, sun, and salt-fog in freshwater environments.\u003c\/li\u003e\n\u003cli\u003eEasy to install in factory locations with included mounting hardware and attractive grilles.\u003c\/li\u003e\n\u003cli\u003eHandles 100W RMS and covers a wide 55-22kHz frequency range for detailed highs and solid midbass.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAs a coaxial 5-1\/4in speaker it cannot replace the deep output of a dedicated subwoofer for very low bass.\u003c\/li\u003e\n\u003cli\u003eIP56 rating is splash-proof for freshwater but not a substitute for fully sealed offshore marine speakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker type\u003c\/td\u003e\n\u003ctd\u003e2-way coaxial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e5-1\/4in woofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWoofer cone\u003c\/td\u003e\n\u003ctd\u003ePolypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTweeter\u003c\/td\u003e\n\u003ctd\u003e3\/4in silk dome\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e55-22kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e4 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower handling\u003c\/td\u003e\n\u003ctd\u003e100W RMS (peak power supported)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Polk DB522 is a sensible upgrade for drivers and boat owners who want clearer, louder sound than factory speakers without a complex install. Its combination of \u003cstrong\u003eresonance-free tuning\u003c\/strong\u003e, marine-focused durability, and included hardware make it a good value for anyone replacing 5-1\/4in speakers and wanting reliable performance in both car and freshwater marine settings.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these speakers waterproof?\u003c\/strong\u003e\u003cbr\u003eThey are IP56 splash-proof and tested for salt-fog, UV, and humidity, suitable for freshwater boats and exposed vehicle locations but not fully submersible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill they fit factory door locations?\u003c\/strong\u003e\u003cbr\u003eThey are designed to fit common 5-1\/4in factory openings and include mounting hardware and grilles for straightforward installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they need an external crossover?\u003c\/strong\u003e\u003cbr\u003eNo, they include a built-in crossover to route highs and lows to the tweeter and woofer inside the coaxial assembly.\u003c\/p\u003e","brand":"Polk Audio","offers":[{"title":"Default Title","offer_id":48158138925275,"sku":"B01EZWFNKA","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61ZVlmL8AmL._AC_SL1200.jpg?v=1768710825","url":"https:\/\/gearmusthave.com\/products\/polk-audio-db522-5-1-4in-coaxial-speakers-for-car-marine-use","provider":"GearMustHave","version":"1.0","type":"link"}