{"product_id":"rcf-lf18n405-18-inch-neo-sub-woofer-audio-speaker-4-inside-outside-copper-voice-coil-1500-wrms-3000-watt-max-dual-forced-air-vent-8-ohms","title":"RCF LF18N405 18-inch Neo Sub Woofer Audio Speaker 4\" Inside | Outside Copper Voice Coil 1500 Wrms 3000 Watt Max Dual-Forced Air Vent 8 Ohms","description":"RCF LF18N405 18-inch Neo Sub Woofer Audio Speaker 4\" Inside | Outside Copper Voice Coil 1500 Wrms 3000 Watt Max Dual-Forced Air Vent 8 Ohms\n\nFeatures || › 4.0 - inch Inside\/Outside copper voice coil || › 3000 Watt continuous program power handling || › 97.5 dB Sensitivity || › 25Hz - 1kHz Frequency range || › Hypervented magnetic structure for minimum power compression || › Triple roll surround and exponential cone geometry || Safety agency CE compliant ||\n\nTECHNICAL SPECIFICATIONS || Nominal Diameter 18 inch \/ 457 mm || Rated Impedance 8 ohm || Program Power (watt) 3000 W || Power handling capacity 1500 W || Sensitivity 97.0 dB || Frequency range 30 - 1000 Hz || Effective piston diameter 395 mm \/ 15.55 inch || Max. Excursion Before Damage 58 mm \/ 2.28 inch || Minimum Impedance (ohm) 6.0 ohm ||\n\nTECHNICAL SPECIFICATIONS || Voice Coil Diameter 4.0 inch \/ 102 mm || Voice Coil Winding Material Copper || Voice Coil Length 36 mm \/ 1.42 inch || Number of layers 2 || Kind of layers inside\/outside || Top Plate Thickness 15 mm \/ 0.59 inch || Cone Design Curved || Surround Material Polycotton || Surround Design Triple roll || Magnets Neodymium || Hypervented magnetic structure Yes || Spider 01 ||\n\nParameters || Resonance frequency (Fs) 30 Hz || DC resistance (Re) (ohm) 4.90 ohm || Mechanical factor 7.00 Qms || Electrical factor 0.34 Qes || Total factor 0.32 Qts || Bl factor (Bl) (T x m) 26.50 T x m || Effective moving mass (Mms) 261.0 g || Equivalent Cas air loaded (Vas) 227.0 liters || Effective piston area (Sd) 0.120 m2 || Max. linear excursion (Xmax) 14 mm || Voice coil inductance @ 1kHz (Le1k) 1.70 mH || Half-space efficiency (Eff) 1.70% ||\n\nMounting information || Overall diameter 465 mm \/ 18.31 inches || Bolt circle diameter 442-447 mm \/ 17.4-17.6 inch || Bolt hole diameter 7 mm \/ 0.28 inch || Front mount baffle cut-out 424 mm \/ 16.69 inch || Rear mount baffle cut-out 425 mm \/ 16.73 inch || Volume occupied by the driver 5.5 liters \/ 0.22 ft3 || Size || Height 208 mm \/ 8.19 inches || Diameter 465 mm \/ 18.31 inches || Weight 8.8 kg \/ 19.4 lbs ||","brand":"RCF","offers":[{"title":"Default Title","offer_id":51184662118715,"sku":"LF18N405","price":619.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/1553\/5163\/files\/medium_14190b87-3b1c-43d8-9201-39f831841e4c.jpg?v=1776711899","url":"https:\/\/savenclick.com\/products\/rcf-lf18n405-18-inch-neo-sub-woofer-audio-speaker-4-inside-outside-copper-voice-coil-1500-wrms-3000-watt-max-dual-forced-air-vent-8-ohms","provider":"savenclick","version":"1.0","type":"link"}