Upgrade your car audio system with this powerful bundle featuring the PowerBass OE-400 4" Mid-Range Speakers and S-1S 1" Silk Dome Tweeters. The OE-400 speakers are designed as a perfect replacement for BOSE™ systems, offering crisp highs and deep lows with their black pressed treated paper cone and nylon accordion surround. With a 2-ohm system impedance and an efficient 12 oz. motor structure, the OE-400 speakers bring out the best sound quality for your late-model vehicle. These speakers have a nominal impedance of 2-ohm, a 4" size, and a sensitivity of 87 dB, providing a frequency response of 80 Hz - 21 kHz and power handling of 40/80 watts (RMS/Peak). Pair these speakers with the S-1S Silk Dome Tweeters for a complete audio experience. The S-1S tweeters deliver smooth and accurate sound reproduction with a 1" silk dome diaphragm, neodymium magnet, and Ferrofluid® cooling system. These tweeters feature a 4-ohm system impedance, 91 dB sensitivity, and a frequency response of 3 kHz - 20 kHz. With included flush/angle/surface mounts and an in-line 12 dB crossover, installation is quick and hassle-free. The S-1S tweeters have a 1" size, 0.75" mounting depth, and can handle 50/100 watts (RMS/Peak) power, ensuring a premium audio experience in your vehicle. Enhance your listening experience with this high-performance audio bundle from PowerBass.