Features: 4" 2-Way Speakers, Power Handling: 40 Watt Max, Power Handling: 20 Watt RMS, Full-Range, Polypropylene woofer, PET dome tweeter with a neodymium magnet, Frequency Response: 90-20000Hz, Impedance: 4 Ohms, Sensitivity: 84 dB | Blaupunkt | | BPS-E452 4" 40 Watt Max 2-Way Car Speakers (Pair) | Best Buy