The MA52B 5 Inch Slim Fit Marine/Caravan 2-way speakers are compact and perfect for boats or caravans. They have a black polypropylene 5inch driver with an inverted rubber surround for durability. The 28mm tweeter is made of PEI with Ferro Fluid for clear high frequencies. With 200W peak power handling and 22W RMS power handling, they offer powerful sound. The frequency response is 60Hz to 20kHz. They have a sensitivity of 89dB and 4-ohm impedance, making them efficient.