I'm assuming that you have two audio cables yet one socket in your tv to plug in? That was my problem. If I had one in I'd hear, out of both speakers, what should be coming out of one of them.

I recently got a Y-shaped jack to plug both of them in and now I can hear both of them way better. It's a big improvement on my sound.

Now I'm going to go through my 70-something DVDs, listen to all of my commentaries and concert films