SPECIFICATIONS: Woofer: 10” (256mm) N-Power: 100W Peak Power: 1000W Impedance: 4Ω Frequency Response: 45-1.3kHZ Sensitivity (dB/W/m): 88 ±3dB Subwoofer Magnet: 120x60x20mm Power Requirements: 12DC Car Battery(Negative Ground) Power Supply Voltage: 14.4V(10.5V - 16V) Unit Dimension: 23.0”×5.7” / 8.1”×12.8” (585x145 / 205x325mm) WHAT'S IN THE BOX: NBX25L x 1pc Mounting Screw x 10pcs Sheetiron x 2pcs Hexagonal Wrench x 1pc