Main Features CarSoundFit App Custom Fit Adaptor Open & SmoothTM IMPPTM Speaker Size 6" x 9" Type 4-Way Coaxial System Max Power 650 Watt Continuous power output 100 W Frequency response 22 Hz – 24 KHz Sensitivity 90 dB Impedance 4 Ω Mounting Depth 86 mm Woofer Cut-Out Hole 153 x 222 mm Woofer material IMPP™ Composite Cone Voice Coil type Copper Voice Coil bobbin type GLASS IMIDE Tweeter Type PIEZOELECTRIC 4-way Coaxial 6" x 9" Speaker Grill