SPCEIFICATINONS Nomin diameter : 457mm. 18in Nomin al impe dance: 8 ohm Power rating: 500W RMS Sensitivity (1w/1m) : 99dB±3dB Frequency range: 37-2.5KHz Voice Coil diameter : φ99.3mm Voice coil length: 25mm Air gap height: 12mm magnet dimension : φ220mm*25mm
THIELE & SMALL PARAMETERS Resonace frequency,FS: 50Hz D.C.Resistan ce,Re: 2*3 ohm Mechanical quality factor,Qms: 8.6 Electrical quality factor,Qes: 0.32 Total quality factor,Qts: 0.29 Equivalent air volme to Cms,Vas: 117L Mechanical compliance,Cms: 0.22mm/N Bl factor,Bl: 32N/A Effective surface area,Sd: 0.054㎡
MATERIALS Basket: Aluminium Cone and dust can : Paper Surround: Treated cloth Voice coil wire: Copper Voice coil bobbin: Aluminium Magnet: Ferrite
MOUNTING INFORMATION Overall diameter: φ310mm Bolt circle diameter: φ290mm Baffle cutout diameter:φ280mm Depth: 147mm Net weight: 8.8kg
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