General Specifications . Nominal Diameter: 126/5 mm/inch . Rated Impedence: 6 ohm . Power Handling capacity: 40 watts . Sensitivity: 92 dB . Frequancy Range: Fs-6000 Hz . Voice Coil Diameter: 25/1.0 mm/inch  Thiele-Small Parameters  . Resonance Frequancy: fs 196 Hz . Dc Resistance: Re 5.2 ohm . Mechanical Factor: Qms 7.6 . Electrical Factor: Qes 1.1 . Total Factor: Qts 0.97 . Bl Factor: BL 5.2 T.M . Effective Moving Mass: Mms 4.5 g . Effective Cas Air load: Vas 1.4 liters . Effective Piston area: Sd 0.008 m^2  Mounting Information   . Overall Diameter: 133x133/5.3x5.3 mm/inch . Bolt Circle Diameter: 137/5.4 mm/inch . Bolt Hole Diameter: 4-~5.2/4~0.2 mm/inch . Mount Baffle Cut-Out: 113/4.5 mm/inch . Depth: 68/2.7 mm/inch