Brand NEW Re Audio Sx18d4 18" 1,000 Watt Rms Rated (2000w Peak) Dual Voice Coil 4 Ohm Car Subwoofer with Triple Stacked Magnets and a Cast Aluminum Basket **Hand Built in the Usa** SX18D4 - RE Audio 18" 1000W RMS Dual 4-Ohm SX Series Subwoofer Power Handling: RMS: 1000 watts Impedance: 4 ohm Dual composite 2-piece cone Mounting Depth: 9.5"