Eminence Commonwealth 12 12" Guitar Speaker The Eminence Commonwealth 12 in guitar speaker offer a warm and rich tone, but very clean and well defined. Great presence, very full & smooth. Very little cone breakup, but distortion friendly. | COMMONWEALTH™ 12 | | | SPECIFICATION | | | Nominal Basket Diameter | 12 , 304.8mm | | Nominal Impedance* | 8 ohms | | Power Rating | |  Watts | 225W | | Music Program | | | Resonance | 50Hz | | Usable Frequency Range | 50Hz-4kHz | | Sensitivity*** | 100 | | Magnet Weight | 109 oz. | | Gap Height | 0.29 , 7.2mm | | Voice Coil Diameter | 4 , 101.6mm | | | | | THIELE & SMALL PARAMETERS | | | Resonant Frequency (fs) | 50Hz | | DC Resistance (Re) | 6.34 | | Coil Inductance (Le) | 0.46mH | | Mechanical Q (Qms) | 6.61 | | Electromagnetic Q (Qes) | 0.35 | | Total Q (Qts) | 0.33 | | Compliance Equivalent Volume (Vas) | 90 liters / 3.2 cu. ft. | | Peak Diaphragm Displacement Volume (Vd) | 36cc | | Mechanical Compliance of Suspension (Cms) | 0.24mm/N | | BL Product (BL) | 15.7 T-M | | Diaphram Mass inc. Airload (Mms) | 43 grams | | Efficiency Bandwidth Product (EBP) | 143 | | Maximum Linear Excursion (Xmax) | 0.7mm | | Surface Area of Cone (Sd) | 519.5 cm2 | | Maximum Mechanical Limit (Xlim) | | | | | | MOUNTING INFORMATION | | | Recommended Enclosure | | | Sealed | Acceptable | | Vented | Acceptable | | Overall Diameter | 12.28 , 312.0mm | | Baffle Hole Diameter | 11.08 , 281.3mm | | Front Sealing Gasket | fitted as standard | | Rear Sealing Gasket | | | Mounting Holes Diameter | 0.27 , 6.8mm | | Mounting Holes B.C. D. | 11.69 , 297.0mm | | Depth | 5 , 127mm | | Net Weight | 21.5 lbs., 9.8 kg | | Shipping Weight | 23.2 lbs., 10.5 kg | | | | | MATERIALS OF CONSTRUCTION | | | Coil Construction | Aluminum voice coil | | Coil Former | Polyimide former | | Magnet Composition | Ferrite magnet | | Core Details | Vented core | | Basket Materials | Die-cast aluminum basket | | Cone Composition | Paper Cone | | Cone Edge Composition | Cloth cone edge | | Dustcap Composition | Aluminum dust cap |
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