EMINENCE DELTA PRO-18A Hi-Quality 18" Pro Subwoofer 8-Ohms 1000W PA Speaker
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Description:
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 Ω
Power Rating*
Program Power 1000 W
Watts 500 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 Ω
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
