{"product_id":"down4sound-sb-15-subwoofer-500w-rms","title":"Down4Sound SB 15\" Subwoofer 500W RMS","description":"\u003cp\u003eElevate your car audio system with the DOWN4SOUND SB-15 Subwoofer, crafted to deliver deep, precise bass and exceptional clarity. Designed with a dual 2-ohm voice coil configuration and 500W RMS power handling, this subwoofer is built for high-performance setups that demand durability and top-tier sound quality. Its optimized suspension and robust motor structure ensure strong, accurate low-frequency output for daily or demo-focused builds.\u003c\/p\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e500W RMS power handling\u003c\/li\u003e \u003cli\u003eDual 2-ohm voice coil configuration\u003c\/li\u003e \u003cli\u003e2.5-inch high-temperature voice coil\u003c\/li\u003e \u003cli\u003e21 mm one-way Xmax\u003c\/li\u003e \u003cli\u003eHighly optimized suspension\u003c\/li\u003e \u003cli\u003eDesigned for high-performance systems\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eTechnical Specifications (T\/S Parameters)\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003eRevc (DC Resistance)\u003c\/h2\u003e2.03 ohm\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eResonance Frequency (Fs)\u003c\/h2\u003e30.87 Hz\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eQms\u003c\/h2\u003e4.132\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eQes\u003c\/h2\u003e0.825\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eQts\u003c\/h2\u003e0.689\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eMms (Moving Mass)\u003c\/h2\u003e271.1 g\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eCms (Compliance)\u003c\/h2\u003e83.11 μm\/N\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eRms\u003c\/h2\u003eNot specified\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eVas\u003c\/h2\u003e91.18 L\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSd:\u003c\/strong\u003e 855.29 cm²\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eBL Product\u003c\/h2\u003e16.42 T·m\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eSensitivity (SPL)\u003c\/h2\u003e87.0 dB\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eXmax\u003c\/h2\u003e21 mm\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eDisplacement\u003c\/h2\u003e0.19 cu ft\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eEngineering and Construction\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eOptimized suspension for accurate low-frequency reproduction\u003c\/li\u003e \u003cli\u003eVented motor for improved cooling\u003c\/li\u003e \u003cli\u003ePrecision-wound 2.5-inch voice coil\u003c\/li\u003e \u003cli\u003eDurable cone and surround assembly\u003c\/li\u003e \u003cli\u003eRobust motor designed for consistent high-output performance\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eRecommended Enclosures\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003ePorted\u003c\/h2\u003e3.0 cu ft (net)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003ePort Area\u003c\/h2\u003e44 sq in\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003ePort Tuning\u003c\/h2\u003e35 Hz\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eSealed\u003c\/h2\u003eNot recommended\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003ePhysical Dimensions\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003ch2\u003eCutout Diameter\u003c\/h2\u003e13.62 in (346 mm)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eOutside Diameter\u003c\/h2\u003e15.51 in (394 mm)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eMounting Depth\u003c\/h2\u003e8.01 in (203.5 mm)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eMotor Height\u003c\/h2\u003e3.54 in (90 mm)\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eNet Weight\u003c\/h2\u003e23.3 lb\u003c\/li\u003e \u003cli\u003e\n\u003ch2\u003eGross Weight\u003c\/h2\u003e 25.5 lb\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eWhy You Should Buy\u003c\/strong\u003e\u003c\/h2\u003e \u003cul\u003e \u003cli\u003ePowerful low-end performance\u003c\/li\u003e \u003cli\u003eDual 2-ohm wiring flexibility\u003c\/li\u003e \u003cli\u003eDurable, long-lasting construction\u003c\/li\u003e \u003cli\u003eDesigned for precise, impactful bass reproduction\u003c\/li\u003e \u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAuthorized Down4Sound dealer at JS Ultimate Sounds. Free shipping on orders $99+.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Down4Sound","offers":[{"title":"D2","offer_id":66828362055725,"sku":"SB15D2","price":189.99,"currency_code":"USD","in_stock":true},{"title":"D4","offer_id":66828362088493,"sku":"SB15D4","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/down4sound-sb-15-subwoofer-500w-rms-w_05c5445f-a93e-4e9f-8eb7-4ec7f09354ab.jpg?v=1782676819","url":"https:\/\/www.jsultimatesounds.com\/products\/down4sound-sb-15-subwoofer-500w-rms","provider":"JS Ultimate Sounds","version":"1.0","type":"link"}