CELESTION FTR18-4080F 600-Watt 18-Inch Die-Cast Chassis Subwoofer Delivers a massive 1200 Watts of continuous power handling Ideal for vented (bass-reflex) or horn-loaded subwoofer designs Low harmonic distortion thanks to "Full Flux Saturation" technology Multi-layer Inside/Outside voice coil for maximum heat dissipation 18" die-cast aluminum subwoofer, perfect for upgrades or repairs