{"product_id":"rockford-r2d4-12-subwoofer-30-cm-12-double-bobine-250-w-rms-4-ohm","title":"ROCKFORD R2D4-12 – Subwoofer 30 cm (12\") – Dual Coil – 250 W RMS – 4 Ohm","description":"\u003ch2\u003e ROCKFORD R2D4-12 – Subwoofer 30 cm (12\") – Dual Coil – 250 W RMS – 4 Ohm\u003c\/h2\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cstyle\u003e\n    table {\n        width: 100%;\n        border-collapse: collapse;\n        background-color: #E0F7FA; \/* Bleu ciel *\/\n    }\n    th, td {\n        border: 1px solid #0288D1;\n        padding: 10px;\n        text-align: left;\n    }\n    th {\n        background-color: #0288D1;\n        color: white;\n    }\n    p {\n        margin-top: 10px;\n    }\n\u003c\/style\u003e\n \u003cp data-start=\"433\" data-end=\"708\" class=\"\"\u003eThe \u003cstrong data-start=\"436\" data-end=\"464\"\u003eRockford Fosgate R2D4-12\u003c\/strong\u003e is a \u003cstrong data-start=\"472\" data-end=\"497\"\u003e12\" (30 cm) Prime Series subwoofer\u003c\/strong\u003e designed to deliver \u003cstrong data-start=\"539\" data-end=\"584\"\u003epowerful, dynamic and precise bass\u003c\/strong\u003e . Its \u003cstrong data-start=\"597\" data-end=\"621\"\u003edual 4 ohm voice coil\u003c\/strong\u003e allows flexible installations for any type of mono or stereo configuration.\u003c\/p\u003e\n\n \u003cp data-start=\"710\" data-end=\"1126\" class=\"\"\u003eIt features a \u003cstrong data-start=\"730\" data-end=\"775\"\u003emica-injected polypropylene cone\u003c\/strong\u003e , a \u003cstrong data-start=\"782\" data-end=\"844\"\u003estamped metal basket with integrated Spider ventilation\u003c\/strong\u003e , and an \u003cstrong data-start=\"854\" data-end=\"896\"\u003eanodized aluminum voice coil holder\u003c\/strong\u003e , ensuring \u003cstrong data-start=\"911\" data-end=\"961\"\u003eoptimal cooling and long-lasting performance\u003c\/strong\u003e . This subwoofer is compatible with \u003cstrong data-start=\"1009\" data-end=\"1029\"\u003esealed or vented\u003c\/strong\u003e enclosures, and is perfect for car audio enthusiasts looking for excellent value for money. \u003c\/p\u003e\n\n\u003chr data-start=\"1128\" data-end=\"1131\" class=\"\"\u003e\n\n\u003ch2 data-start=\"1133\" data-end=\"1164\" class=\"\"\u003e Main features \u003c\/h2\u003e\n\n\u003cul data-start=\"1165\" data-end=\"1667\"\u003e\n\n\u003cli data-start=\"1165\" data-end=\"1208\" class=\"\"\u003e\n\n\u003cp data-start=\"1167\" data-end=\"1208\" class=\"\"\u003e \u003cstrong data-start=\"1167\" data-end=\"1192\"\u003e12\" (30 cm) dual voice coil subwoofer\u003c\/strong\u003e \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1209\" data-end=\"1259\" class=\"\"\u003e\n\n\u003cp data-start=\"1211\" data-end=\"1259\" class=\"\"\u003e \u003cstrong data-start=\"1211\" data-end=\"1235\"\u003ePower handling\u003c\/strong\u003e : 250 W RMS \/ 500 W Max \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1260\" data-end=\"1305\" class=\"\"\u003e\n\n\u003cp data-start=\"1262\" data-end=\"1305\" class=\"\"\u003e \u003cstrong data-start=\"1262\" data-end=\"1275\"\u003eImpedance\u003c\/strong\u003e : Dual 4 ohm voice coil (2x4Ω)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1306\" data-end=\"1352\" class=\"\"\u003e\n\n \u003cp data-start=\"1308\" data-end=\"1352\" class=\"\"\u003e\u003cstrong data-start=\"1308\" data-end=\"1320\"\u003eMembrane\u003c\/strong\u003e : Polypropylene injected with mica \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1353\" data-end=\"1410\" class=\"\"\u003e\n\n\u003cp data-start=\"1355\" data-end=\"1410\" class=\"\"\u003e \u003cstrong data-start=\"1355\" data-end=\"1365\"\u003eBasket\u003c\/strong\u003e : StampCast with integrated Spider ventilation \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1411\" data-end=\"1454\" class=\"\"\u003e\n\n\u003cp data-start=\"1413\" data-end=\"1454\" class=\"\"\u003e \u003cstrong data-start=\"1413\" data-end=\"1434\"\u003eSpool Holder\u003c\/strong\u003e : Anodized Aluminum \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1455\" data-end=\"1514\" class=\"\"\u003e\n\n\u003cp data-start=\"1457\" data-end=\"1514\" class=\"\"\u003e \u003cstrong data-start=\"1457\" data-end=\"1467\"\u003eSpinne\u003c\/strong\u003e : Linear with integrated 16 AWG braided cables \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1515\" data-end=\"1561\" class=\"\"\u003e\n\n\u003cp data-start=\"1517\" data-end=\"1561\" class=\"\"\u003e \u003cstrong data-start=\"1517\" data-end=\"1532\"\u003eConnections\u003c\/strong\u003e : 4 mm² compression terminals \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1562\" data-end=\"1619\" class=\"\"\u003e\n\n\u003cp data-start=\"1564\" data-end=\"1619\" class=\"\"\u003e \u003cstrong data-start=\"1564\" data-end=\"1575\"\u003eMounting\u003c\/strong\u003e : Optimized for sealed or bass reflex enclosures \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1620\" data-end=\"1667\" class=\"\"\u003e\n\n\u003cp data-start=\"1622\" data-end=\"1667\" class=\"\"\u003e \u003cstrong data-start=\"1622\" data-end=\"1634\"\u003eFinish\u003c\/strong\u003e : Integrated PVC finishing ring \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr data-start=\"1669\" data-end=\"1672\" class=\"\"\u003e\n\n\u003ch2 data-start=\"1674\" data-end=\"1692\" class=\"\"\u003e Pack contents \u003c\/h2\u003e\n\n\u003cul data-start=\"1693\" data-end=\"1788\"\u003e\n\n\u003cli data-start=\"1693\" data-end=\"1731\" class=\"\"\u003e\n\n\u003cp data-start=\"1695\" data-end=\"1731\" class=\"\"\u003e 1 Rockford Fosgate R2D4-12 Subwoofer \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1732\" data-end=\"1764\" class=\"\"\u003e\n\n\u003cp data-start=\"1734\" data-end=\"1764\" class=\"\"\u003e Integrated PVC finishing ring \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1765\" data-end=\"1788\" class=\"\"\u003e\n\n\u003cp data-start=\"1767\" data-end=\"1788\" class=\"\"\u003e Installation instructions \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr data-start=\"1790\" data-end=\"1793\" class=\"\"\u003e\n\n\u003ch2 data-start=\"1795\" data-end=\"1823\" class=\"\"\u003e Technical specifications \u003c\/h2\u003e\n\n\u003cdiv class=\"_tableContainer_16hzy_1\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\n\u003ctable data-start=\"1825\" data-end=\"3133\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\n\u003cthead data-start=\"1825\" data-end=\"1874\"\u003e\n\n\u003ctr data-start=\"1825\" data-end=\"1874\"\u003e\n\n\u003cth data-start=\"1825\" data-end=\"1864\" data-col-size=\"sm\"\u003e Features\u003c\/th\u003e\n\n\u003cth data-start=\"1864\" data-end=\"1874\" data-col-size=\"sm\"\u003e Detail \u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody data-start=\"1925\" data-end=\"3133\"\u003e\n\n\u003ctr data-start=\"1925\" data-end=\"1989\"\u003e\n\n\u003ctd data-start=\"1925\" data-end=\"1964\" data-col-size=\"sm\"\u003e Kind\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"1964\" data-end=\"1989\"\u003e 12\" (30 cm) subwoofer \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"1990\" data-end=\"2042\"\u003e\n\n\u003ctd data-start=\"1990\" data-end=\"2029\" data-col-size=\"sm\"\u003e RMS power\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2029\" data-end=\"2042\"\u003e 250 Watts \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2043\" data-end=\"2095\"\u003e\n\n\u003ctd data-start=\"2043\" data-end=\"2082\" data-col-size=\"sm\"\u003e Maximum power\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2082\" data-end=\"2095\"\u003e 500 Watts \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2096\" data-end=\"2158\"\u003e\n\n\u003ctd data-start=\"2096\" data-end=\"2135\" data-col-size=\"sm\"\u003e Coil type\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2135\" data-end=\"2158\"\u003e Dual Coil (DVC) \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2159\" data-end=\"2211\"\u003e\n\n\u003ctd data-start=\"2159\" data-end=\"2198\" data-col-size=\"sm\"\u003e Impedance\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2198\" data-end=\"2211\"\u003e 2x 4 Ohms \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2212\" data-end=\"2260\"\u003e\n\n\u003ctd data-start=\"2212\" data-end=\"2251\" data-col-size=\"sm\"\u003e Coil diameter\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2251\" data-end=\"2260\"\u003e 51 mm \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2261\" data-end=\"2309\"\u003e\n\n\u003ctd data-start=\"2261\" data-end=\"2300\" data-col-size=\"sm\"\u003e SPL sensitivity (1W\/1m)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2300\" data-end=\"2309\"\u003e 89 dB\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2310\" data-end=\"2360\"\u003e\n\n \u003ctd data-start=\"2310\" data-end=\"2349\" data-col-size=\"sm\"\u003eResonant frequency (Fs)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2349\" data-end=\"2360\"\u003e 34.9 Hz \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2361\" data-end=\"2413\"\u003e\n\n\u003ctd data-start=\"2361\" data-end=\"2400\" data-col-size=\"sm\"\u003e DC resistance (Re)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2400\" data-end=\"2413\"\u003e 7.17 Ohms \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2414\" data-end=\"2463\"\u003e\n\n\u003ctd data-start=\"2414\" data-end=\"2453\" data-col-size=\"sm\"\u003e Inductance (The)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2453\" data-end=\"2463\"\u003e 3.9 mH \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2464\" data-end=\"2516\"\u003e\n\n\u003ctd data-start=\"2464\" data-end=\"2503\" data-col-size=\"sm\"\u003e Membrane surface area (Sd)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2503\" data-end=\"2516\"\u003e 539.1 cm² \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2517\" data-end=\"2564\"\u003e\n\n\u003ctd data-start=\"2517\" data-end=\"2556\" data-col-size=\"sm\"\u003e Qts\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2556\" data-end=\"2564\"\u003e 0.60 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2565\" data-end=\"2612\"\u003e\n\n\u003ctd data-start=\"2565\" data-end=\"2604\" data-col-size=\"sm\"\u003e Qms\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2604\" data-end=\"2612\"\u003e 7.33 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2613\" data-end=\"2660\"\u003e\n\n\u003ctd data-start=\"2613\" data-end=\"2652\" data-col-size=\"sm\"\u003e Qes\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2652\" data-end=\"2660\"\u003e 0.66 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2661\" data-end=\"2715\"\u003e\n\n\u003ctd data-start=\"2661\" data-end=\"2700\" data-col-size=\"sm\"\u003e Equivalent air volume (Vas)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2700\" data-end=\"2715\"\u003e 68.8 liters \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2716\" data-end=\"2765\"\u003e\n\n\u003ctd data-start=\"2716\" data-end=\"2755\" data-col-size=\"sm\"\u003e Linear excursion (Xmax)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2755\" data-end=\"2765\"\u003e 6.5 mm \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2766\" data-end=\"2820\"\u003e\n\n\u003ctd data-start=\"2766\" data-end=\"2805\" data-col-size=\"sm\"\u003e Recommended box volume (closed)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2805\" data-end=\"2820\"\u003e 28.8 liters \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2821\" data-end=\"2878\"\u003e\n\n\u003ctd data-start=\"2821\" data-end=\"2863\" data-col-size=\"sm\"\u003e Recommended subwoofer volume (bass reflex)\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2863\" data-end=\"2878\"\u003e 50.6 liters \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2879\" data-end=\"2928\"\u003e\n\n\u003ctd data-start=\"2879\" data-end=\"2918\" data-col-size=\"sm\"\u003e Installation depth\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2918\" data-end=\"2928\"\u003e 128 mm \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2929\" data-end=\"2978\"\u003e\n\n\u003ctd data-start=\"2929\" data-end=\"2968\" data-col-size=\"sm\"\u003e Cutting diameter\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"2968\" data-end=\"2978\"\u003e 285 mm \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"2979\" data-end=\"3031\"\u003e\n\n\u003ctd data-start=\"2979\" data-end=\"3018\" data-col-size=\"sm\"\u003e Moving the speaker\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"3018\" data-end=\"3031\"\u003e 1.3 liters \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"3032\" data-end=\"3082\"\u003e\n\n\u003ctd data-start=\"3032\" data-end=\"3071\" data-col-size=\"sm\"\u003e Engine weight\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"3071\" data-end=\"3082\"\u003e 1.35 kg \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr data-start=\"3083\" data-end=\"3133\"\u003e\n\n\u003ctd data-start=\"3083\" data-end=\"3122\" data-col-size=\"sm\"\u003e Total shipping weight\u003c\/td\u003e\n\n\u003ctd data-col-size=\"sm\" data-start=\"3122\" data-end=\"3133\"\u003e 9.49 kg \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2 data-start=\"3140\" data-end=\"3189\" class=\"\"\u003e Why choose the Rockford Fosgate R2D4-12? \u003c\/h2\u003e\n\n\u003cul data-start=\"3190\" data-end=\"3504\"\u003e\n\n\u003cli data-start=\"3190\" data-end=\"3262\" class=\"\"\u003e\n\n\u003cp data-start=\"3192\" data-end=\"3262\" class=\"\"\u003e ✅ \u003cstrong data-start=\"3194\" data-end=\"3223\"\u003eDynamic and precise bass\u003c\/strong\u003e , ideal for a powerful installation \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3263\" data-end=\"3346\" class=\"\"\u003e\n\n\u003cp data-start=\"3265\" data-end=\"3346\" class=\"\"\u003e ✅ \u003cstrong data-start=\"3267\" data-end=\"3291\"\u003eDual 4 ohm coil\u003c\/strong\u003e for flexible wiring (2 or 8 ohms in parallel\/series) \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3347\" data-end=\"3390\" class=\"\"\u003e\n\n\u003cp data-start=\"3349\" data-end=\"3390\" class=\"\"\u003e ✅ \u003cstrong data-start=\"3351\" data-end=\"3390\"\u003eRobust and high-performance construction\u003c\/strong\u003e \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3391\" data-end=\"3433\" class=\"\"\u003e\n\n\u003cp data-start=\"3393\" data-end=\"3433\" class=\"\"\u003e ✅ Compatible \u003cstrong data-start=\"3406\" data-end=\"3433\"\u003ewith closed or ventilated enclosures\u003c\/strong\u003e \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3434\" data-end=\"3504\" class=\"\"\u003e\n\n\u003cp data-start=\"3436\" data-end=\"3504\" class=\"\"\u003e ✅ The world-renowned Rockford Fosgate signature sound \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cimg style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0770\/1928\/3723\/files\/MS-2-_FINAL_3eb5048c-0af5-481e-bd02-fe9bbd0f92a0_160x160.png?v=1734546281\"\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Rockford","offers":[{"title":"Default Title","offer_id":51396308336907,"sku":"R2D4-12","price":109.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/1928\/3723\/files\/Rockford-ROCKFORD-R2D4-12-_-Subwoofer-30-cm-_12_-_-Double-Bobine-_-250-W-RMS-_-4-Ohm-Multison-185901641.webp?v=1747147507","url":"https:\/\/mumltisun.com\/en\/products\/rockford-r2d4-12-subwoofer-30-cm-12-double-bobine-250-w-rms-4-ohm","provider":"mumltisun.com","version":"1.0","type":"link"}