Power Rating Watts 50W Music Program Resonance 89Hz Usable Frequency Range 70Hz-6kHz Sensitivity 103 Magnet Weight 35 ounce Gap Height 0.312", 7.92mm Voice Coil Diameter 1.75", 44.5mm SOUND CLIPS THIELE and SMALL PARAMETERS Clean Heavy OD Resonant Frequency (FS) 89Hz DC Resistance (Re) 11.4 Coil Inductance (Le) 0.71mH Download PDF Spec Sheet Mechanical Q (QMS) 8.93 Electromagnetic Q (QES) 1.09 Total Q (QTS) 0.97 Compliance Equivalent Volume (Vas) 50.2 liters / 1.8 cu.ft. Mechanical Compliance of Suspension (CMS) 0.13mm/N BL Product (BL) 12.0 T-M Diaphragm Mass Inc. Air load (Mms) 24 grams Efficiency Bandwidth Product (EBP) 82 Maximum Linear Excursion (XMAX) 0.5mm Surface Area of Cone (SD) 519.5 cm2 Maximum Mechanical Limit (XLIM) MOUNTING INFORMATION Recommended Enclosure Sealed Acceptable Vented Acceptable Overall Diameter 12.02", 305.3mm Baffle Hole Diameter 10.97", 278.6mm Front Sealing Gasket fitted as standard Rear Sealing Gasket fitted as standard Mounting Holes Diameter 0.25", 6.4mm Mounting Holes B.C. D. 11.63", 295.4mm Depth 6.2", 158mm Net Weight 9.3 lbs., 4.2 kg Shipping Weight 11.1 lbs., 5 kg MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Former Nomex former Magnet Composition Alnico magnet Core Details Non-vented core Basket Materials Pressed steel basket Cone Composition Paper Cone Edge Composition Paper cone edge Dust cap Composition Zurette dust cap