
Audiovox’s 4.5-inch-high sub slips inconspicuously under your couch and fires upward to yield booty-shaking bass in music or re-create ground- shaking explosions in action movies. It packs the power of a bulky subwoofer into a slim case by using a 10-inch speaker to push air against a second 12-inch cone that’s big enough to resonate with the very deepest sounds. $500; audiovox.com