Just purchased & RETURNED this tv. We were thrilled when we took it out of the box..until we set it up. The sound is AWFUL. The sound waves from very low to extremely loud - so loud that it actually makes a popping noise. And, no it wasn't only when commercials came on - it is continuous. Unfortunately for us I did not do any sort of research before purchasing the tv. Now that I've put in a couple of searches on this tv, I see that I wasn't the only person who had issues with the sound. It seems to be the #1 complaint on this model. It is unfortunate because Westinghouse is a good name brand. We did return this set and purchase a slightly more expensive model that is not a Westinghouse. Hope this helped out.