EMINENCE DELTA PRO 18A KOMPONEN / COMPONENT SPEAKER

KOMPONEN / COMPONENT SPEAKER EMINENCE DELTA PRO 18A Long throw subwoofer for very small vented boxes. Over-sized top plate and large pole vent help keep the coil cool. SPECIFICATION : Nominal Basket Diameter 18" , 457 mm Nominal Impedance* 8 © Power Rating* * Watts 500 W Music Program 1000 W Resonance 28 Hz Usable Frequency Range 37 Hz - 0.2 kHz Sensitivity* * * 96 dB Magnet Weight 67 oz. Gap Height 0.38" , 9.7 mm Voice Coil Diameter 2.5" , 64 mm THIELE & SMALL PARAMETERS : Resonant Frequency ( fs) 28 Hz DC Resistance ( Re) 5.3 © Coil Inductance ( Le) 3.43m H Mechanical Q ( Qms) 10.38 Electromagnetic Q ( Qes) 0.33 Total Q ( Qts) 0.32 Compliance Equivalent Volume ( Vas) 493.2 liters / 17.42 cu.ft. Peak Diaphragm Displacement Volume ( Vd) 796 cc Mechanical Compliance of Suspension ( Cms) 0.25 mm/ N BL Product ( BL) 18.9 T-M Diaphragm Mass Inc. Airload ( MMs) 128 grams Efficiency Bandwidth Product ( EBP) 84 Maximum Linear Excursion ( Xmax) 6.7 mm Surface Area of Cone ( Sd) 1188 cm2 Maximum Mechanical Limit ( Xlim) 15. mm MOUNTING INFORMATION : Recommended Enclosure Volume Sealed N/ a Vented 85-297 liters / 3-10.5 cu.ft. Driver Volume Displaced 0.212 cu.ft. / 6.01 liters Overall Diameter 18" , 457.2 mm Baffle Hole Diameter 16.57" , 420.9 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.28" , 7.1mm Mounting Holes B.C.D. 17.25" , 438.2mm Depth 8.13" , 206.5 mm Net Weight 17 lbs, 7.71 kg Shipping Weight 20.5 lbs, 9.3 kgs MATERIALS OF CONSTRUCTION : Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented and extended core Basket Materials Die-cast aluminum basket Cone Composition Paper cone Cone Edge Composition Cloth cone edge Dust Cap Composition Solid composition paper dust cap