DTI DS77MR 7.7-Inch 240 Watts Max Power 2-Way Marine Boat Water Resistant High Power Audio Stereo Coaxial Speaker System (white) 240W Max Power, 4 Ohm Impedance, Sensitivity: 92 dB 25 Oz Magnet / 50 Oz Magnet Structure, Frequency Response: 60 Hz -20 KHz 1"High Temperature KaptonVoice Coil, 20mm Neodymium Teteron Dome Tweeter High Quality White P.P Cone, Santoprene Surround, Water Resistant Construction Design