{"product_id":"rcf-woofer-lf18x451-8-ohm-4000w-18-driver","title":"RCF Woofer LF18X451 8 ohm 4000W 18\" Driver","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/p\u003e \u003cp data-start=\"0\" data-end=\"480\"\u003e\u003c\/p\u003e \u003cp data-start=\"0\" data-end=\"480\"\u003eThe RCF LF18X451 is a high-power 18-inch professional low-frequency woofer designed for premium subwoofer and sound reinforcement systems. Built to handle extreme output levels with accuracy and control, it is well suited for touring applications, large venues, and fixed installations where deep, punchy bass and long-term reliability are essential. The advanced neodymium motor structure and reinforced cone design ensure high efficiency while keeping overall weight manageable.\u003c\/p\u003e \u003cp data-start=\"482\" data-end=\"1237\"\u003eThis woofer has a nominal diameter of 18 inches and an 8 ohm impedance. Power handling is rated at 2000 W AES with a program power capacity of 4000 W, allowing it to operate safely at very high sound pressure levels. Sensitivity is approximately 97 dB (1 W\/1 m), delivering strong output with efficient amplifier use. The frequency response extends from roughly 35 Hz to 1 kHz, making it ideal for deep bass reproduction with clean low-mid performance. It features a large 4.5-inch inside\/outside copper voice coil for excellent thermal management and consistent performance under heavy load. The rigid aluminum basket and high-excursion suspension system provide mechanical stability and durability. The net weight of the driver is approximately 15.2 kg.\u003c\/p\u003e \u003cp data-start=\"1239\" data-end=\"1432\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eOverall, the RCF LF18X451 is a powerful and reliable choice for professional audio systems that demand maximum low-frequency impact, efficiency, and durability in high-output subwoofer designs.\u003c\/p\u003e \u003cp data-start=\"1239\" data-end=\"1432\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003c\/p\u003e \u003cp data-start=\"0\" data-end=\"305\"\u003eNominal diameter: 18 inch \/ 457 mm\u003cbr data-start=\"34\" data-end=\"37\"\u003eRated impedance: 8 ohm\u003cbr data-start=\"59\" data-end=\"62\"\u003eProgram power: 3600 W\u003cbr data-start=\"83\" data-end=\"86\"\u003ePower handling capacity: 1800 W\u003cbr data-start=\"117\" data-end=\"120\" data-is-only-node=\"\"\u003eSensitivity: 97.0 dB\u003cbr data-start=\"140\" data-end=\"143\"\u003eFrequency range: 30 – 1000 Hz\u003cbr data-start=\"172\" data-end=\"175\"\u003eEffective piston diameter: 395 mm \/ 15.55 inch\u003cbr data-start=\"221\" data-end=\"224\"\u003eMaximum excursion before damage: 54 mm \/ 2.13 inch\u003cbr data-start=\"274\" data-end=\"277\"\u003eMinimum impedance: 6.8 ohm\u003c\/p\u003e \u003cp data-start=\"307\" data-end=\"527\"\u003eVoice coil diameter: 4.5 inch \/ 114 mm\u003cbr data-start=\"345\" data-end=\"348\"\u003eVoice coil winding material: copper\u003cbr data-start=\"383\" data-end=\"386\"\u003eVoice coil length: 34 mm \/ 1.34 inch\u003cbr data-start=\"422\" data-end=\"425\"\u003eNumber of layers: 2\u003cbr data-start=\"444\" data-end=\"447\" data-is-only-node=\"\"\u003eLayer configuration: inside \/ outside\u003cbr data-start=\"484\" data-end=\"487\"\u003eTop plate thickness: 15 mm \/ 0.59 inch\u003c\/p\u003e \u003cp data-start=\"529\" data-end=\"685\"\u003eCone design: straight\u003cbr data-start=\"550\" data-end=\"553\"\u003eSurround material: polycotton\u003cbr data-start=\"582\" data-end=\"585\"\u003eSurround design: triple roll\u003cbr data-start=\"613\" data-end=\"616\"\u003eMagnet type: ceramic\u003cbr data-start=\"636\" data-end=\"639\" data-is-only-node=\"\"\u003eDual-force air ventilation: yes\u003cbr data-start=\"670\" data-end=\"673\"\u003eSpider: 03\u003c\/p\u003e \u003cp data-start=\"687\" data-end=\"1113\"\u003eResonance frequency (Fs): 30 Hz\u003cbr data-start=\"718\" data-end=\"721\"\u003eDC resistance (Re): 5.40 ohm\u003cbr data-start=\"749\" data-end=\"752\"\u003eMechanical factor (Qms): 6.70\u003cbr data-start=\"781\" data-end=\"784\"\u003eElectrical factor (Qes): 0.29\u003cbr data-start=\"813\" data-end=\"816\" data-is-only-node=\"\"\u003eTotal factor (Qts): 0.28\u003cbr data-start=\"840\" data-end=\"843\"\u003eBl factor: 30.50 T·m\u003cbr data-start=\"863\" data-end=\"866\"\u003eEffective moving mass (Mms): 260.0 g\u003cbr data-start=\"902\" data-end=\"905\"\u003eEquivalent compliance volume (Vas): 220.0 liters\u003cbr data-start=\"953\" data-end=\"956\"\u003eEffective piston area (Sd): 0.120 m²\u003cbr data-start=\"992\" data-end=\"995\"\u003eMaximum linear excursion (Xmax): 14 mm\u003cbr data-start=\"1033\" data-end=\"1036\"\u003eVoice coil inductance at 1 kHz (Le): 1.38 mH\u003cbr data-start=\"1080\" data-end=\"1083\"\u003eHalf-space efficiency: 1.90%\u003c\/p\u003e \u003cp data-start=\"1115\" data-end=\"1396\"\u003eOverall diameter: 465 mm \/ 18.31 inch\u003cbr data-start=\"1152\" data-end=\"1155\"\u003eBolt circle diameter: 442–447 mm \/ 17.4–17.6 inch\u003cbr data-start=\"1204\" data-end=\"1207\"\u003eBolt hole diameter: 7 mm \/ 0.28 inch\u003cbr data-start=\"1243\" data-end=\"1246\"\u003eFront mount baffle cut-out: 424 mm \/ 16.69 inch\u003cbr data-start=\"1293\" data-end=\"1296\" data-is-only-node=\"\"\u003eRear mount baffle cut-out: 424 mm \/ 16.69 inch\u003cbr data-start=\"1342\" data-end=\"1345\"\u003eDriver displacement volume: 6.5 liters \/ 0.26 ft³\u003c\/p\u003e \u003cp data-start=\"1398\" data-end=\"1512\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eCompliance standard: CE\u003cbr data-start=\"1421\" data-end=\"1424\"\u003eHeight: 212 mm \/ 8.35 inch\u003cbr data-start=\"1450\" data-end=\"1453\"\u003eDiameter: 465 mm \/ 18.31 inch\u003cbr data-start=\"1482\" data-end=\"1485\"\u003eWeight: 15.2 kg \/ 33.51 lbs\u003c\/p\u003e \u003cp data-start=\"1239\" data-end=\"1432\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003c\/p\u003e \u003cp\u003e\u003c\/p\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":51527772176704,"sku":"150-11100091","price":399.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/9322\/1184\/files\/508bcf82-607a-4846-9f98-16312019959a.jpg?v=1770878208","url":"https:\/\/www.simplysoundandlighting.co.uk\/de\/products\/rcf-woofer-lf18x451-8-ohm-4000w-18-driver","provider":"Simply Sound and Lighting","version":"1.0","type":"link"}