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Nominal Basket Diameter 18", 457.2mm Nominal Impedance* 8 ohms Power Rating Watts 650W Music Program 1300W Resonance 28Hz Usable Frequency Range 41Hz-2.4kHz Sensitivity*** 99 Magnet Weight 120 oz. Gap Height 0.375", 9.53mm Voice Coil Diameter 3", 76.2mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 28Hz DC Resistance (Re) 6.29 Coil Inductance (Le) 1.90mH Mechanical Q (Qms) 8.28 Electromagnetic Q (Qes) 0.30 Total Q (Qts) 0.29 Compliance Equivalent Volume (Vas) 441.2 liters / 15.6 cu. ft. Peak Diaphragm Displacement Volume (Vd) 695cc Mechanical Compliance of Suspension (Cms) 0.24mm/N BL Product (BL) 22.1 T-M Diaphram Mass inc. Airload (Mms) 130 grams Efficiency Bandwidth Product (EBP) 93 Maximum Linear Excursion (Xmax) 6.1mm Surface Area of Cone (Sd) 1140.0 cm2 Maximum Mechanical Limit (Xlim) 18.0mm MOUNTING INFORMATION Recommended Enclosure Sealed Vented 93-212 liters/3.3-7.5 cu.ft. Overall Diameter 18", 457.2mm Baffle Hole Diameter 16.56", 420.5mm 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 8.15", 207mm Net Weight 24.5 lbs., 11.1 kg Shipping Weight 28.1 lbs., 12.8 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

Nominal Basket Diameter 18", 457.2mm Nominal Impedance* 8 ohms Power Rating Watts 800W Music Program 1600W Resonance 25Hz Usable Frequency Range 40Hz-800Hz Sensitivity*** 97 Magnet Weight 109 oz. Gap Height 0.375", 9.53mm Voice Coil Diameter 4", 101.6mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 25Hz DC Resistance (Re) 5.20 Coil Inductance (Le) 1.67mH Mechanical Q (Qms) 8.18 Electromagnetic Q (Qes) 0.32 Total Q (Qts) 0.31 Compliance Equivalent Volume (Vas) 548.7 liters / 19.4 cu. ft. Peak Diaphragm Displacement Volume (Vd) 556cc Mechanical Compliance of Suspension (Cms) 0.29mm/N BL Product (BL) 18.8 T-M Diaphram Mass inc. Airload (Mms) 138 grams Efficiency Bandwidth Product (EBP) 79 Maximum Linear Excursion (Xmax) 4.8mm Surface Area of Cone (Sd) 1159.0 cm2 Maximum Mechanical Limit (Xlim) 16.0mm MOUNTING INFORMATION Recommended Enclosure Sealed Vented 96-198 liters/ 3.4-7 cu.ft. Overall Diameter 18", 457.2mm Baffle Hole Diameter 16.56", 420.5mm 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 8.15", 207mm Net Weight 25.2 lbs., 11.4 kg Shipping Weight 28.9 lbs., 13.1 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

Nominal Basket Diameter 18", 457.2mm Nominal Impedance* 8 ohms Power Rating Watts 800W Music Program 1600W Resonance 32Hz Usable Frequency Range 36Hz-200Hz Sensitivity*** 95 Magnet Weight 109 oz. Gap Height 0.375", 9.53mm Voice Coil Diameter 4", 101.6mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 32Hz DC Resistance (Re) 6.19 Coil Inductance (Le) 4.78mH Mechanical Q (Qms) 10.38 Electromagnetic Q (Qes) 0.36 Total Q (Qts) 0.35 Compliance Equivalent Volume (Vas) 237.9 liters / 8.4 cu. ft. Peak Diaphragm Displacement Volume (Vd) 939cc Mechanical Compliance of Suspension (Cms) 0.12mm/N BL Product (BL) 27.0 T-M Diaphram Mass inc. Airload (Mms) 211 grams Efficiency Bandwidth Product (EBP) 89 Maximum Linear Excursion (Xmax) 7.9mm Surface Area of Cone (Sd) 1188.0 cm2 Maximum Mechanical Limit (Xlim) 15.9mm MOUNTING INFORMATION Recommended Enclosure Sealed Vented 125-210 liters/ 4.4-7.4 cu.ft. Overall Diameter 18", 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", 7mm Mounting Holes B.C. D. 17.25", 438.2mm Depth 8.13", 206.4mm Net Weight 24 lbs, 10.9 kg Shipping Weight 26 lbs, 11.8 kg MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Undercut with copper shorting ring and Core Periphery Ventilation Basket Materials Die-cast aluminum basket Cone Composition Acrylic Wetlook Paper Cone Cone Edge Composition Cloth cone edge Dustcap Composition Acrylic wetlook paper dust cap

Nominal Basket Diameter 18", 457.2mm Nominal Impedance* 8 ohms Power Rating Watts 1250W Music Program 2500W Resonance 33Hz Usable Frequency Range 33Hz-600Hz Sensitivity*** 95.5 Magnet Weight 109 oz. Gap Height 0.375", 9.53mm Voice Coil Diameter 4", 101.6mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 33Hz DC Resistance (Re) 5.84 Coil Inductance (Le) 2.38mH Mechanical Q (Qms) 14.24 Electromagnetic Q (Qes) 0.58 Total Q (Qts) 0.56 Compliance Equivalent Volume (Vas) 239.9 liters / 8.5 cu. ft. Peak Diaphragm Displacement Volume (Vd) 1136cc Mechanical Compliance of Suspension (Cms) 0.13mm/N BL Product (BL) 19.7 T-M Diaphram Mass inc. Airload (Mms) 186 grams Efficiency Bandwidth Product (EBP) 57 Maximum Linear Excursion (Xmax) 9.8mm Surface Area of Cone (Sd) 1159.0 cm2 Maximum Mechanical Limit (Xlim) 19.1mm MOUNTING INFORMATION Recommended Enclosure Sealed 133-147 liters/4.7-5.2cu.ft. Vented 144-258 liters/5.1-9.1cu.ft. Overall Diameter 18", 457.2mm Baffle Hole Diameter 16.56", 420.6mm Front Sealing Gasket fitted as standard Rear Sealing Gasket fitted as standard Mounting Holes Diameter 0.25", 6.4mm Mounting Holes B.C. D. 17.25", 438.2mm Depth 8.15", 207mm Net Weight 27.4 lbs., 12.4 kg Shipping Weight 30.9 lbs., 14 kg MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Extended core with Core Periphery Ventilation Basket Materials Die-cast aluminum basket Cone Composition Paper Cone Cone Edge Composition Cloth cone edge Dustcap Composition Porous cloth top spider/ heatsink