Stage2 Series speakers brings a JBL concert experience to your car, truck or SUV. Their Polypropylene woofer delivers a strong performance with great low end extension and clean tight midrange. The woofer is couple with a PEI Balanced dome tweeter which fills out their sonic signature with crisp, high-end frequencies. An added bonus of Stage 2 series is JBL's frame design, which has been engineered to easily fit into most factory openings without the need to modify the vehicle, mounting location or the speaker itself. Power Handling: 45W RMS, 270W PEAK Sensitivity: 91db Frequency response: 55HZ-20KHZ Impedance: 40HMS Competitively Tuned JBL Design Language