Altec Lansing 641 Computer Speakers "sub started smoking" Questions

started smoking- I smelled a burning odor, wasnt even on the computer, found smoke coming out of the holes in the back of the subwoofer, and crackling noises throught the subwoofer speaker itself. The

...sub and flipped that master power one time and a tiny bit of smoke started coming from somewhere within the mass of internal electronic equipment. So what should I try, or where should I take the sub ...