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Professional AudioSpeakersRaw Frame Speakers → Eminence DELTA PRO-18A 18"
Eminence DELTA PRO-18A 18"

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DELTA PRO-18A    
SPECIFICATION  
Nominal Basket Diameter 18'', 457mm
Nominal Impedance* 8 ohms
Power Rating  
Watts 500W
Music Program 1000W
Resonance 28Hz
Usable Frequency Range 37Hz-250Hz
Sensitivity*** 96
Magnet Weight 67 oz.
Gap Height 0.380'', 9.53mm
Voice Coil Diameter 2.5'', 63.5mm

THIELE & SMALL PARAMETERS  
Resonant Frequency (fs) 28Hz
DC Resistance (Re) 5.3
Coil Inductance (Le) 3.43mH
Mechanical Q (Qms) 10.38
Electromagnetic Q (Qes) 0.33
Total Q (Qts) 0.32
Compliance Equivalent Volume (Vas) 493.2 liters / 17.41cu.ft.
Peak Diaphragm Displacement Volume (Vd) 796cc
Mechanical Compliance of Suspension (Cms) 0.25mm/N
BL Product (BL) 18.9 T-M
Diaphram Mass inc. Airload (Mms) 128 grams
Efficiency Bandwidth Product (EBP) 84
Maximum Linear Excursion (Xmax) 6.7mm
Surface Area of Cone (Sd) 1188.0 cm2  
Maximum Mechanical Limit (Xlim) 15.0mm  
     
MOUNTING INFORMATION    
Recommended Enclosure    
Sealed  
Vented 85-297 liters/3.0-10.5 cu.ft.  
Overall Diameter 18.00'', 457.2mm  
Baffle Hole Diameter 16.57'', 420.9mm  
Front Sealing Gasket fitted as standard  
Rear Sealing Gasket fitted as standard  
Mounting Holes Diameter 0.28'', 7.1mm  
Mounting Holes B.C. D. 17.25'', 438.2mm  
Depth 8.13'', 207mm  
Net Weight 17.0 lbs, 7.7 kg  
Shipping Weight 20.5 lbs, 9.3 kg  
     
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  
Dustcap Composition Solid composition paper dust cap  
 




 
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