{"product_id":"rcf-l18p300-woofer","title":"RCF L18P300 Woofer","description":"\u003cdiv\u003eIn production for over 10 years, the \u003cspan style=\"font-weight: bold;\"\u003eL18P300\u003c\/span\u003e is an industry standard.\u003c\/div\u003e \u003cdiv\u003e \u003c\/div\u003e \u003cdiv\u003eThe  very stromg magnetic unit, with 15mm thick plates and specially designed suspensions ensure an excellent control of amplitude of over +\/- 12millimeters. The special cooling system with forced air ventilation offer a great haet dissipation and the minimum levels of power compression available on the market. Voice coil construction, suapensions and cone materials are upgraded in order to withstand up to a Kilowatt 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\u003e2000W continuous program power handling\u003c\/li\u003e \u003cli\u003e97 dB Sensitivity\u003c\/li\u003e \u003cli\u003e35 Hz – 1.5 kHz Frequency range\u003c\/li\u003e \u003cli\u003eForced air ventilation and 15mm top plate for minimum power compression\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: 2000 W AES\u003c\/li\u003e \u003cli\u003ePower handling capacity: 1000 W AES\u003c\/li\u003e \u003cli\u003eSensitivity: 97 dB\u003c\/li\u003e \u003cli\u003eFrequency Range: 35 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: 6.0 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: 23 \/ 0.9 mm\/inch\u003c\/li\u003e \u003cli\u003eNumber of layers: inside \/ outside\u003c\/li\u003e \u003cli\u003eKind of layer: 2\u003c\/li\u003e \u003cli\u003eTop Plate Thickness: 15 \/ 0.6 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: 33 Hz\u003c\/li\u003e \u003cli\u003eDC resistance: 5.0Ω\u003c\/li\u003e \u003cli\u003eMechanical factor: 8.3\u003c\/li\u003e \u003cli\u003eElectrical factor: 0.34\u003c\/li\u003e \u003cli\u003eTotal factor: 0.33\u003c\/li\u003e \u003cli\u003eBL Factor: 23.5 T · m\u003c\/li\u003e \u003cli\u003eEffective Moving Mass: 180 g\u003c\/li\u003e \u003cli\u003eEquivalent Cas air load: 226 liters\u003c\/li\u003e \u003cli\u003eEffettive piston area: 0.113 m²\u003c\/li\u003e \u003cli\u003eMax. linear excursion (mathematical): 7.8 mm\u003c\/li\u003e \u003cli\u003eVoice - coil inductance @ 1kHz: 1.9 mH\u003c\/li\u003e \u003cli\u003eHalf-space efficiency: 2.30%\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 \/ mm\/inch\u003c\/li\u003e \u003cli\u003eVolume occupied by the driver: 6.5 \/ 0.23 liters\/ft³\u003c\/li\u003e \u003cli\u003eNet Weight: 14 \/ 31.1 kg\/lbs\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"RCF","offers":[{"title":"Default Title","offer_id":32388167958663,"sku":"L18P300","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0319\/3687\/2583\/products\/img_proxy_2753c22e-8653-4614-a22d-f88e70412e98.jpg?v=1582296121","url":"https:\/\/www.balkanimal.com\/products\/rcf-l18p300-woofer","provider":"Audiofeen","version":"1.0","type":"link"}