Specifications: Nominal Diameter = 6.5" Nominal Impedance = 4 OHM RMS Power Handling = 300W Maximum Power Handling = 600W Sensitivity (1w/1m) = 93dB Frequency Response = 136Hz-10KHz Recommended HI Pass Crossover = 160 Hz Motor: Voice Coil Diameter = 2" / 50.8mm Voice Coil Former Material = GLASS FIBER Winding Material = CCAW Cone Material = NON-PRESSED PAPER Surround Material = CLOTH Basket Material = ALUMINUM Magnet Material = FERRITE Magnet Weight = 34 oz Displacement Volume = 0.047L Thiele & Small Parameters: Equivalent Volume = Vas = 2.1982 LTR Excursion (one way) = Xmax = 8.9mm Free Air Resonance = Fs = 136.9Hz Mechanical Factor = Qms = 4.003 Electrical Factor = Qes = 0.601 Total Factor = Qts = 0.523 CD Resistance = Re = 3.2 OHMS Measurement: Overall Diameter = 6.81" / 173mm Overall Depth = 3.7" / 95mm Front Mount Baffle Cutout = 5.82"/ 148mm Mounting Depth = 3.34" / 85mm