Nominal Diameter: 6.5″ (1651.1mm) Nominal Impedance: 4 ohms RMS Power Handing: 225 Watts MAX Power Handing: 450 Watts Sensitivity (1w/1m): 96dB Frequnecy Response: 65Hz – 22KHz Recommended Hi Pass Crossover 120Hz Midrange  Voice Coil Diameter: 1.5″ (38.1mm) Voice Coil Former Material: Kapton Winding Material: CCAW Basket Material: Steel Magnet Weight: 27 oz Tweeter  Voice Coil Diameter: 1″ Voice Coil Material: Kapton Winding Material: CCAW Diaphragm Material: Aluminum Alloy Magnet Weight: 0.44 oz Magnet Material: Neodymium Thiele & Small Parameters  Equivalent Volume / Vas 2.917 LTR Excursion / Xmax 1.6mm Free Air Resonance / Fs 150Hz Mechanical Factor / Qms 3.906 Electrical Factor / Qes 0.747 Total Factor / Qts 0.701 DC Resistance / Re 3.2 Measurements  Overall Diameter: 178mm (7″) Front Mount Baffle Cutout: 144mm (5.67″) Mounting Depth: 77mm (3.03″) Overall Depth: 97mm (3.81)