I have an old TV (cheap stuff from walmart for college student), of which speaker can not produce a clear sound. So I would like to connect the TV to an external speaker to improve the sound, but it doesn't have an audio out jack. My idea to solve this problem is to open the back of my TV, cut the wire connecting to TV's speaker, and then reconnect the wire ends to a female jack to make an audio out port. Is it possible to do that? or anything else should I concern?