CarSoundFit App Custom Fit Adaptor Open & SmoothTM IMPPTM Speaker Size 16.5 cm Type 2-Way Component System Max Power 350 Watt Continuous power output 80 W Frequency response 34 Hz – 49 KHz Sensitivity 85 dB Impedance 4 Ω Woofer material IMPP™ Composite Cone Voice Coil type Copper Voice Coil bobbin type KAPTON Tweeter Cut-Out Hole 144 mm Tweeter Type DOME 2-Way Component.