DS18 PRO-BLF18 PRO Series 18" 1500W RMS Subwoofer-Set of 1 2600 Watts Max Power and 1500 Watts RMS Power Red Color Aluminum Basket with Cloth Edge and Paper with Glass Fiber Cone 135 Oz High-Strength Ferrite Magnet, 3" Black Aluminum 4-Layer Voice Coil, and 2-Layer Conex Spider 4+4-Ohms Impedance and 99.2dB of Sensitivity 40-3.5KHz Frequency Response