Recommended for professional audio as a woofer in vented enclosures. Also ideal for horn loading and scoops.
Applications 
 Subwoofer | Woofer | Pro Audio
Box Type: Vented | Scoop Loading | Horn Loading
Specifications
Download Spec Sheet Download Cab Design| SPECIFICATION | |
| Nominal Basket Diameter | 18", 457 mm | 
| Nominal Impedance* | 8 Ω | 
| Power Rating* | |
| Program Power | 1600 W | 
| Watts | 800 W | 
| Resonance | 25 Hz | 
| Usable Frequency Range | 40 Hz - 0.8 kHz | 
| Sensitivity* | 97 dB | 
| Magnet Weight | 109 oz. | 
| Gap Height | 0.375", 9.5 mm | 
| Voice Coil Diameter | 4", 102 mm | 
| THIELE & SMALL PARAMETERS | |
| Resonant Frequency (fs) | 25 Hz | 
| DC Resistance (Re) | 5.2 Ω | 
| Coil Inductance (Le) | 1.67m H | 
| Mechanical Q (Qms) | 8.18 | 
| Electromagnetic Q (Qes) | 0.32 | 
| Total Q (Qts) | 0.31 | 
| Compliance Equivalent Volume (Vas) | 548.7 liters / 19.38 cu.ft. | 
| Peak Diaphragm Displacement Volume (Vd) | 556 cc | 
| Mechanical Compliance of Suspension (Cms) | 0.29 mm/N | 
| BL Product (BL) | 18.8 T-M | 
| Diaphragm Mass Inc. Airload (MMs) | 137 grams | 
| Efficiency Bandwidth Product (EBP) | 79 | 
| Maximum Linear Excursion (Xmax) | 4.8 mm | 
| Surface Area of Cone (Sd) | 1159 cm2 | 
| Maximum Mechanical Limit (Xlim) | 16 mm | 
| MOUNTING INFORMATION | |
| Recommended Enclosure Volume | |
| Sealed | N/a | 
| Vented | 96-198 liters / 3.4-7 cu.ft. | 
| Driver Volume Displaced | 0.234 cu.ft. / 6.62 liters | 
| Overall Diameter | 18", 457.2 mm | 
| Baffle Hole Diameter | 16.56", 420.6 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 | 8.15", 207 mm | 
| Net Weight | 25.2 lbs, 11.43 kg | 
| Shipping Weight | 28.9 lbs, 13.11 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 | 
Frequency Response
              
            
      
      
      
      


