The Jensen CPM50 combo includes a 2-channel Bluetooth amplifier with 80-watt maximum power. Waterproof rated to IPX6 standards, the amplifier and speaker set is ideal for marine environments. Amplifier features epoxy-potted enclosure with flush-mount lighted chrome switch. Operating voltage from 10 - 18V DC. MS5006W speakers have a maximum power handling of 30 watts. The waterproof speakers are constructed with one-piece molded chassis and corrosion and UV-resistant finish. Polypropylene cloth woofer cone. 4 ohm impedance. Mounting hole diameter: 4.5". Mounting depth: 1.5".