The JBL ARENA X 12-inch (300mm) subwoofer is nothing short of amazing. Leveraging technology fro JBL's Professional and Luxury Audio divisions, where loudspeakers have to fill giant stadiums, concert venues and movie theaters with incredible sound, this subwoofer takes a completely new approach to moving air in a car. Light and agile opposed 2.5-inch voice coils in a magnetic gap provide completely linear control of cone excursion all the way to Xmax. Symmetrical Field Geometry design ensures linear cone travel and low distortion at virtually any output level. The proprietary motor is surrounded by high-tech materials such as a cast-aluminum frame, concave cone, nitrile butadiene rubber (NBR) one-piece surround, golden-plated speaker terminal binding posts, progressive spider and vented pole piece. Power handling is a massive 1,600 Watts peak (800 Watts RMS) and all of its parts work in harmony to cool voice coils. The Arena X is the 12-inch reference standard - nothing else comes close.