The Eminence Texas Heat is the All-American guitar speaker that?s packin? heat, Texas style. It delivers a nice warm, fat tone with top end bite and clarity to cut through a mix while maintaining a rich, bluesy tone. Very touch-sensitive with a hint of British flavor. Specification Nominal Basket Diameter 12", 304.8mm Nominal Impedance* 8 ohms Power Rating** Watts 150W Music Program N/A Resonance 79Hz Usable Frequency Range 70Hz - 4.7kHz Sensitivity*** 99.4dB Magnet Weight 38 oz. Gap Height 0.31", 7.92mm Voice Coil Diameter 2", 50.8mm Thiele & Small Parameters Resonant Frequency (fs) 79Hz DC Resistance (Re) 7.3 Coil Inductance (Le) 0.54mH Mechanical Q (Qms) 13.88 Electromagnetic Q (Qes) 0.68 Total Q (Qts) 0.65 Compliance Equivalent Volume (Vas) 50.9 liters / 1.8 cu.ft. Peak Diaphragm Displacement Volume (Vd) 41.6cc Mechanical Compliance of Suspension (Cms) 0.13mm/N BL Product (BL) 12.8 T-M Diaphragm Mass Inc. Airload (MMs) 30.8 grams Efficiency Bandwidth Product (EBP) 116 Maximum Linear Excursion (Xmax) 0.8mm Surface Area of Cone (Sd) 519.5 cm2 Maximum Mechanical Limit (Xlim) N/A Mounting Information Recommended Enclosure Volume Sealed Acceptable Vented Acceptable Driver Volume Displaced 122 cu.in. / 2 liters Overall Diameter 12.03", 305.5mm Baffle Hole Diameter 11.07", 281.1mm Front Sealing Gasket Fitted as standard Rear Sealing Gasket Fitted as standard Mounting Holes Diameter 0.25", 6.4mm Mounting Holes B.C.D. 11.59", 294.3mm Depth 5.1", 130mm Net Weight 8.3 lbs, 3.8 kg Shipping Weight 10 lbs, 4.5 kgs Materials of Construction Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Non-vented core Basket Materials Pressed steel basket Cone Composition Paper cone Cone Edge Composition Paper cone edge Dust Cap Composition Zurette dust cap