The BassJump is a portable subwoofer designed for the MacBook, that will turn your MacBook into a sound system. The subwoofer comes with software that combines audio from your MacBook speakers with the low frequency bass coming from the BassJump subwoofer.
The result is a dramatically richer and fuller sound experience. The device is powered by USB, so you wont need any extra cables, adapters or power cords. It will cost you $79.99 and comes packaged in an exclusive neoprene travel case.