The midrange truck speakers should have to handle the most significant part of the audible sound spectrum, the region where the most basic signals emitted by outdoor stereo speakers and especially the human voice lie. This range contains most of the sounds with which the human ear is most familiar, and where deviations from faithful reproduction are most easily observed. It is therefore essential that a good quality car midrange speaker is capable of providing a low distortion reproduction.FEATURES:Nominal Diameter: 10 inchNominal Impedance: 4 OhmMAX Power: 1000WRMS Power: 500WSensitivity(1w/1m): 95dB- 3dBFrequency Range: 67~5.5KHzVoice coil diameter: 2.5 inchVoice coil length: 9/16 inchAir gap height: 5/16 inchTHIELE & SMALL PARAMETERS:Resonant frequency, FS: 67 HzC. Voice coil resistance, Re: 3.5 ohmMechanical quality factor, Qms: 24.53Electrical quality factor, Qes: 0.40Total quality factor, Qts: 0.39Equivalent air volume to Cms, Vas: 25.9LMechanical compliance, Cms: 146 uM/NMechanical resistance, RMS: 0.65 Kg/sBL factor, Bl: 11.83 N/AEffective surface area, Sd: 35.6 m MLinear Excursion, Xmax: 1/8 inchMATERIALS:Basket: Die cast aluminumCone and dust cap: PaperSurround: Treated clothVoice coil wire: CCAWVoice coil bobbin: KaptonMagnet: NdFeBMounting Information:Overall diameter: 10-5/16 mmBolt circle diameter: 9-23/32 mmBaffle cutout diameter: 9-2/37 mmDepth: 3-15/16 inchNet weight: 2.55 Kg