X-57 5' x 7' High Definition Mid-Bass Drivers with Composite Nomex Rohacell Cone

5'x7' 4 Ohm High Definition Midrange Drivers Multi layer ceramic fiber and Rohacell composite cones Parabolic rubber surround Nomex spider with a progressive roll Fiberglass composite nonresonant basket eliminates reflective distortion Power Handling: Peak: 500 watts per set / 250 watts each side RMS: 250 watts per set / 125 watts each side Recommended Power Range: 15-125 watts each side 4 ohms impedance High temperature and high power voice coil Neodymium magnet structure Top-mount depth: 2-3/4' Sensitivity: 92 d B