{"product_id":"clarion-cms-651-cwb-6-5-marine-speakers-30w-rms-power-dual-grilles","title":"Clarion CMS-651-CWB 6.5 in Coaxial Marine Speakers - Weather Tough","description":"\u003cp\u003eOur review of the Clarion CMS-651-CWB finds it best suited for boat owners and marine vehicle owners who want reliable, source unit-powered audio without complicated amplifiers. The biggest reason to buy is its durability: Salt \u0026amp; Sun Certification and UV-resistant components mean these speakers are built to survive real marine conditions while delivering clear highs from a bridge-mounted polymer tweeter. For anyone replacing worn factory speakers or upgrading a small marine sound system, the CMS-651-CWB strikes a solid balance of durability, ease of retrofit, and clean high-frequency detail.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual grille options:\u003c\/strong\u003e Includes both white and black sport grilles so installers can match boat trim or swap appearance without replacing the speaker.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalt \u0026amp; Sun certified:\u003c\/strong\u003e Certified to ASTM B117 and ASTM D4329, the speakers resist salt spray and UV exposure for longer life in marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30W RMS handling:\u003c\/strong\u003e Power handling suited to source unit-powered systems provides sensible volume and reliability without requiring an external amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolymer dome tweeter:\u003c\/strong\u003e The 1\/2 in balanced-dome polymer tweeter with a neodymium magnet and ferrofluid cooling produces crisp highs and improved thermal stability under continuous use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard retrofit size:\u003c\/strong\u003e Standard cutout and mounting hole simplify replacement of existing 6.5 in coaxial marine speakers with minimal modification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe CMS-651-CWB is aimed at recreational boat owners, personal watercraft users, and anyone with a small marine audio setup powered by a head unit who needs a weather-resistant speaker that installs quickly. It is particularly attractive to those who value simple upgrades and the option to change the look with included white and black grilles.\u003c\/p\u003e\n\u003cp\u003eThose seeking very high output for large vessels, professional marine audio installations, or audiophile-level fidelity should consider powered or component systems with higher RMS ratings and separate crossovers, as the 30W RMS rating is optimized for source unit-driven performance rather than heavy amplification.\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\u003eSalt \u0026amp; Sun certification provides confidence against corrosion and UV damage in marine use.\u003c\/li\u003e\n\u003cli\u003eIncluded white and black grilles give a quick cosmetic option without extra parts.\u003c\/li\u003e\n\u003cli\u003eBridge-mounted 1\/2 in polymer tweeter with neodymium magnet yields clear, detailed highs.\u003c\/li\u003e\n\u003cli\u003eStandard cutout size and mounting hole make retrofitting straightforward for most boats.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e30W RMS power handling means these are not designed for high-power, amplified systems seeking extreme output.\u003c\/li\u003e\n\u003cli\u003eAs a coaxial design, bass depth is limited compared with separate woofer-plus-subwoofer setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Size\u003c\/td\u003e\n\u003ctd\u003e6.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Handling\u003c\/td\u003e\n\u003ctd\u003e30W RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTweeter\u003c\/td\u003e\n\u003ctd\u003e1\/2 in (13 mm) balanced-dome polymer, neodymium magnet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eFerrofluid cooling in tweeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeather Rating\u003c\/td\u003e\n\u003ctd\u003eSalt \u0026amp; Sun Certified (ASTM B117 \u0026amp; D4329)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrilles Included\u003c\/td\u003e\n\u003ctd\u003eWhite and black sport grilles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eStandard cutout size and mounting hole for retrofit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Clarion CMS-651-CWB is a practical, value-oriented marine coaxial speaker for anyone replacing factory units or building a modest head unit-driven system. Its Salt \u0026amp; Sun Certification, included grille options, and a well-damped polymer tweeter deliver dependable performance and longevity at a sensible price, though buyers needing big power or deep bass should pair it with a dedicated woofer or amplifier.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these speakers resistant to saltwater and sun exposure?\u003c\/strong\u003e\u003cbr\u003eYes. They carry Salt \u0026amp; Sun Certification to ASTM B117 and D4329 standards, indicating resistance to salt spray and UV exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need an external amplifier to use these speakers?\u003c\/strong\u003e\u003cbr\u003eNo. With 30W RMS power handling they are optimized for source unit-powered systems, so an amplifier is not required for normal use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill they fit my existing 6.5 in openings?\u003c\/strong\u003e\u003cbr\u003eThey use a standard cutout size and mounting hole, so they are designed for straightforward retrofit into most existing 6.5 in marine speaker locations.\u003c\/p\u003e","brand":"Clarion","offers":[{"title":"Default Title","offer_id":46785019740379,"sku":"B0CD2LNJYS","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71jYLAvY2JL._AC_SL1500.jpg?v=1747804494","url":"https:\/\/gearmusthave.com\/products\/clarion-cms-651-cwb-6-5-marine-speakers-30w-rms-power-dual-grilles","provider":"GearMustHave","version":"1.0","type":"link"}