The Furrion 80 Watt Max Sound Bar is passive, works with your onboard stereo system and enhances your television entertainment experience. Amplifier not provided. Add the Furrion subwoofer for superior sound. Easy to install, designed for durability in the marine environment. Max Power:80W. 40 Watts per channel. Impedance: 3.2. Sensitivity:89DB. Frequency Response:150Hz. (FSB24SA2C-BL).