Heavy Duty 18 Inch Professional Audio Best PRO Speaker Subwoofer

Heavy Duty 18 Inch Professional Audio Best Pro Speaker SubwooferProduct main features:- 18 inch PA speaker- Ideal for subwoofer- 900W RMS, 98dB- 4 inch voice coil, 220mm dual magnets   - Subwoofer is ideal for high quality professional bass reflex and bass horn systemsGeneral Specifications  Nominal Diameter460/18mm/inchRated Impedance8ohmNominal Power handling900WattsProgram Power1800WattsSensitivity(lw/lm)97dBFrequency Range33.4-1.8KHzMinimum Impedance(Zmin)5.6ohmVoice Coil Diameter100/4mm/inchVoice Coil Materialcopper Number of layers2 Magnet gap depth14mmSurround ShapeW-roll BasketCast Aluminum Magnet220*2 Ferrite  Mounting Information  Overall Diameter469mmBolt Circle Diameter448mmBaffle Cutout Diameter424mmOverall Depth236mmNet Weight18.85kgShipping weight20.1kgShipping Box490*490*260mmThiele-Small ParametersResonance frequency33.435.5HzDC resistance5.65.6ohmMechanical factor9.894.99 Electrical factor0.440.41 Total factor0.420.38 Mechanical compliance0.090.06mm/NMechanical resistance5.515.6mech-ohmof suspension lossesEffective Moving Mass261.4349.2grHalf-space efficiency1.431.21%BL Factor26.532.6T.mEquivalent Cas air load173.9115.2litersVoice-coil inductance1.11.2mH/* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1