Give your speaker a nice boost of power with the Boss Audio MR101 10" Single Voice Coil Subwoofer. The lowest impedance accepted by this amplifier is 4 ohms, which makes it ideal for powering full-range speakers in your vehicle. This is because most automotive speakers have 4-ohm impedance. This Boss Marine subwoofer is also weatherproof. It integrates high-tech, state-of-the-art waterproofing materials plus special UV coatings for plastic surfaces. The Boss audio subwoofer also offers coated circuit boards and connections to protect it against harsh outdoor elements and resist corrosion. It offers 600W of maximum power and 300W of RMS power. It also has 85-dB sensitivity. When you install this you can give a nice boost of crisp sound to your speaker system. Turn to this device to make your car stereo sound come out nice and clear.