| SPECIFICATION | 
| Nominal Basket Diameter | 12", 305 mm | 
| Nominal Impedance* | 8 Ω | 
| Power Rating** | 
| Watts | 400 W | 
| Music Program | 800 W | 
| Resonance | 51 Hz | 
| Usable Frequency Range | 52 Hz - 4.5 kHz | 
| Sensitivity*** | 99.2 dB | 
| Magnet Weight | 80 oz. | 
| Gap Height | 0.375", 9.5 mm | 
| Voice Coil Diameter | 2.5", 64 mm | 
| THIELE & SMALL PARAMETERS | 
| Resonant Frequency (fs) | 51 Hz | 
| DC Resistance (Re) | 5.71 Ω | 
| Coil Inductance (Le) | 0.84m H | 
| Mechanical Q (Qms) | 7.56 | 
| Electromagnetic Q (Qes) | 0.37 | 
| Total Q (Qts) | 0.35 | 
| Compliance Equivalent Volume (Vas) | 81.7 liters / 2.89 cu.ft. | 
| Peak Diaphragm Displacement Volume (Vd) | 242 cc | 
| Mechanical Compliance of Suspension (Cms) | 0.21 mm/N | 
| BL Product (BL) | 15.3 T-M | 
| Diaphragm Mass Inc. Airload (MMs) | 48 grams | 
| Efficiency Bandwidth Product (EBP) | 138 | 
| Maximum Linear Excursion (Xmax) | 4.6 mm | 
| Surface Area of Cone (Sd) | 532.4 cm2 | 
| Maximum Mechanical Limit (Xlim) | 13.7 mm | 
| MOUNTING INFORMATION | 
| Recommended Enclosure Volume | 
| Sealed | 28.00-35.00 liters / 1.00-1.25 cu.ft. | 
| Vented | 31.00-91.00 liters / 1.10-3.20 cu.ft. | 
| Driver Volume Displaced | 0.09 cu.ft. / 2.55 liters | 
| Overall Diameter | 12.38", 314.5 mm | 
| Baffle Hole Diameter | 11.07", 281.2 mm | 
| Front Sealing Gasket | Yes | 
| Rear Sealing Gasket | Yes | 
| Mounting Holes Diameter | 0.27", 6.9mm | 
| Mounting Holes B.C.D. | 11.69", 296.9mm | 
| Depth | 6.22", 158 mm | 
| Net Weight | 16.3 lbs, 7.39 kg | 
| Shipping Weight | 18 lbs, 8.16 kgs | 
| MATERIALS OF CONSTRUCTION | 
| Coil Construction | Aluminum 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 |