Ground-based subwoofer incorporates ultra-high power Lo Max 18-inch woofer and new cabinet and vent design. It is direct radiator vented subwoofer designed specifically for most demanding pro-audio applications. It is compact for its power handling, SPL output, distortion performance and bass extension. This is made possible by special characteristics designed into Lo Max woofer. Lo Max 18-inch driver is Peavey’s pinnacle of high-power subwoofer design. An incredible 4800W program rating and extra-long cone excursion add up to amazing levels of clean, deep bass from a pair of 18-inch woofers. Incorporating all of features that Peavey has engineered into their woofers over years, including field-replaceable basket, Kevlar-impregnated cone for increased strength and lower distortion due to greater dampening of excess cone vibrations, polyimide-impregnated fiberglass former for higher sensitivity and extended frequency response, die-cast aluminum frame and 4-inch diameter edge-wound voice coil with solderless diffusion welded OFHC copper leads. This makes subwoofer, superior choice for the bass end of any high performance sound system and it is primarily designed for large professional touring and high performance permanent installs.