i have an issue with the sound on my dell lcd tv the volume goes really low and noisy sometimes goes back to normal for a couple of minutes but most of the time its not working like it used to.i tried different speakers,tried it with my dvd but still the same issue.i was thinking on trying a home theater system using the optical digital audio input but before i spend the money do you think that if i go that road the sound wont be a issue anymore?