? High-quality 18? 1400W (RMS) subwoofer transducer with excellent sensitivity and excursion capabilities. ? Assembled using high-quality Ferrite magnets, tightly-wound 5″ inside/outside Copper voice coil, and responsive paper cone. ? Ventilated voice coil gap to reduce power compression, improve conversion efficiency, and superior cooling. ? Heavy-duty die-cast frame with a wide flange for increased rigidity. ? Engineered to suit a wide variety of enclosure designs to deliver high power, clarity, and punch.