VM Audio Encore 15 Inch 4000W DVC Competition Car Audio Power Subwoofer | ECW150 4000 watts peak power; 2000 watts RMS power Dual voice coil, low frequency transducers Lateral high thrust mechanical suspension system Relentless high excursion wide surround Multi-roll, linear-flex damping control large spider RMS Power: 2000 Watts Peak Power: 4000 Watts Dual Voice Coil Low Frequency Transducers Lateral High Thrust Mechanical Suspension System Relentless High Excursion Wide Surround Multi-Roll, Linear-Flex Damping Control Large Spider Low Molecular, Deep Piston Cone Diaphragm Ultra Deep, Proprietary Rust-Treated Stamp Steel Basket High Impact-Resistant One Piece Magnet Boot Protection Aerodynamic, Direct Voice Coil Surface-Cooling System Extended, Thermal Cooling Vented Pole Piece Motor Structure Heavy-Duty Nickel Plated Wire Connection Push Terminals Spider Woven High-Conducting Silver Tinsel Leads Mounting-Guiding Tall Beveled Color Matching Trim Ring Sealed or Ported Enclosure Performance Dual 4O Impedance Configurations Sensitivity (1W/1M): 97dB Frequency Response: 23Hz  340Hz Mounting Depth: 9.04 Inches (229mm) Size: 15&#034; Nominal Impedance: Dual 4 Ohm RMS Power: 2000W Peak Power Handling: 4000W Voice Coil Diameter: 4&#034; (80.5mm) Magnet Weight: 120oz * 2 Frequency Response: 23Hz - 300Hz Sensitivity (1W/1M): 97dB Clone Material: Polypropylene Surround Material: Butyl Rubber Mounting Diameter: 13.70&#034; (348mm) Mounting Height: 9.04&#034; inches (229mm)