Coming back in all itâ€™s glory, the Adire Audio Shiva sets a benchmark for price and performance, offering quality bass on a budget. Built in America, the Shiva features: an upgraded cast aluminum basket, large foam surround, Kevlar impregnated cone, flat progressive epoxy coated spider, 2" diameter VC, over an inch of magnet, vented pole piece, and huge bumped back plate. The Shiva was designed with price and performance in mind. This understated, excellent performer has a rugged, industrial look that is an example of form following function. As with nearly all of our woofers, Shiva is at home in a wide variety of enclosure types. The low Fs, moderate Q and moderate Vas allows for great performance in a wide range of both sealed and vented alignments.