{"product_id":"rcf-l18s801-woofer","title":"RCF L18S801 Woofer","description":"\u003cdiv\u003eThe \u003cspan style=\"font-weight: bold;\"\u003eL18S801 \u003c\/span\u003eis the RCF classical high efficiency 18\" woofer. \u003c\/div\u003e \u003cdiv\u003e \u003c\/div\u003e \u003cdiv\u003eA perfect blend of voice coil length, moving mass weight and suspensions control makes this transducer the preferred solution for many speakers and rental companies. Voice coil construction, suspension and cone materials are upgrade in order to withstand up to 700 watt RMS power.\u003c\/div\u003e \u003cdiv\u003e \u003c\/div\u003e \u003cdiv\u003e\u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e \u003cdiv\u003e \u003cul\u003e \u003cli\u003e4-inch, fiberglass inside\/outside copper voice coil\u003c\/li\u003e \u003cli\u003e1400W continuous program power handling\u003c\/li\u003e \u003cli\u003e99.5 dB Sensitivity\u003c\/li\u003e \u003cli\u003e38 Hz – 1 kHz Frequency range\u003c\/li\u003e \u003cli\u003eDual spider design with silicon based dampening control\u003c\/li\u003e \u003cli\u003eM-roll surround and exponential cone geometry\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv\u003e\u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003eSpecifications\u003c\/span\u003e\u003c\/div\u003e \u003cdiv\u003e \u003cul\u003e \u003cli\u003eNominal Diameter: 460 \/ 18 mm\/inch\u003c\/li\u003e \u003cli\u003eRated Impedance: 8 Ω\u003c\/li\u003e \u003cli\u003eProgram Power: 1400 W AES\u003c\/li\u003e \u003cli\u003ePower handling capacity: 700 W AES\u003c\/li\u003e \u003cli\u003eSensitivity: 99.5 dB\u003c\/li\u003e \u003cli\u003eFrequency Range: 38 Hz ÷ 1000 Hz\u003c\/li\u003e \u003cli\u003eEffective Piston Diameter: 380 \/ 15 mm\/inch\u003c\/li\u003e \u003cli\u003eMax Excursion Before Damage (peak to peak): 40 \/ 1.6 mm\/inch\u003c\/li\u003e \u003cli\u003eMinimum Impedance: 6.3 Ω\u003c\/li\u003e \u003cli\u003eVoice Coil Diameter: 100 \/ 4 mm\/inch\u003c\/li\u003e \u003cli\u003eVoice Coil Material: Copper\u003c\/li\u003e \u003cli\u003eVoice Coil Winding Depth: 18.5 \/ 0.7 mm\/inch\u003c\/li\u003e \u003cli\u003eNumber of layers: 2\u003c\/li\u003e \u003cli\u003eKind of layer: inside \/ outside\u003c\/li\u003e \u003cli\u003eTop Plate Thickness: 10 \/ 0.4 mm\/inch\u003c\/li\u003e \u003cli\u003eCone Material: No pressed pulp\u003c\/li\u003e \u003cli\u003eCone Design: Curved\u003c\/li\u003e \u003cli\u003eSurround Material: Polycotton\u003c\/li\u003e \u003cli\u003eSurround Design: M - roll\u003c\/li\u003e \u003cli\u003eResonance frequency: 39 Hz\u003c\/li\u003e \u003cli\u003eDC resistance: 4.9Ω\u003c\/li\u003e \u003cli\u003eMechanical factor: 8.3\u003c\/li\u003e \u003cli\u003eElectrical factor: 0.30\u003c\/li\u003e \u003cli\u003eTotal factor: 0.29\u003c\/li\u003e \u003cli\u003eBL Factor: 24.5 T · m\u003c\/li\u003e \u003cli\u003eEffective Moving Mass: 148 g\u003c\/li\u003e \u003cli\u003eEquivalent Cas air load: 206 liters\u003c\/li\u003e \u003cli\u003eEffettive piston area: 0.113 m²\u003c\/li\u003e \u003cli\u003eMax. linear excursion (mathematical): 6.8 mm\u003c\/li\u003e \u003cli\u003eVoice - coil inductance @ 1kHz: 1.7 mH\u003c\/li\u003e \u003cli\u003eHalf-space efficiency: 3.93%\u003c\/li\u003e \u003cli\u003eOverall Diameter: 470 \/ 18.5 mm\/inch\u003c\/li\u003e \u003cli\u003eBolt Circle Diameter: 438 \/ 17.2 mm\/inch\u003c\/li\u003e \u003cli\u003eBolt Hole Diameter: 8 \/ 0.3 mm\/inch\u003c\/li\u003e \u003cli\u003eFront Mount Baffle Cut-out: 416 \/ 16.4 mm\/inch\u003c\/li\u003e \u003cli\u003eRear Mount Baffle Cut-out: 416 \/ 16.4 mm\/inch\u003c\/li\u003e \u003cli\u003eDepth: 209 \/ 8.3 mm\/inch\u003c\/li\u003e \u003cli\u003eVolume occupied by the driver: 6.5 \/ 0.23 liters\/ft³\u003c\/li\u003e \u003cli\u003eNet Weight: 13.1 \/ 29.1 kg\/lbs\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":32389750292615,"sku":"L18S801","price":365.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0319\/3687\/2583\/products\/img_proxy_91f8a43f-7ecc-49cd-a16b-f5f3a16a36e9.jpg?v=1582296127","url":"https:\/\/www.balkanimal.com\/products\/rcf-l18s801-woofer","provider":"Audiofeen","version":"1.0","type":"link"}