The Skar Audio EVL-65 D2 6.5-inch dual 2 ohm subwoofer was designed to be the most responsive, powerful, and efficient 6.5 subwoofer on the market. Dont be fooled by the size, the EVL-65 is one monster of a subwoofer, featuring a 2 pure copper voice coil, and a powerful 39 Oz single slug ferrite motor. The small size of this driver allows it to be very versatile, and can be used in a variety of applications where adding a woofer might not otherwise be possible. Conservatively rated at 200 watts RMS Power, and 400 watts max power. Dual 2-ohm voice coil. Sensitivity: 83.1 dB, Fs: 61 Hz, Xmax: 6.25mm one-way. Subwoofer Mounting Depth: 3.561 Subwoofer Cut-Out Diameter: 5.826.