PowerBass XL-844D 8" 400W Dual 4-Ohm Subwoofer. Subwoofer Frequency Range: 40 Hz - 400 Hz. Voice Coil Size: 2 in. Nominal Impedance: Dual 4-ohm. Inputs: Dual Coil. Frequency Response: 40 Hz - 400 Hz. Fs: 41.9 Hz.
eBay