OK - I am exercising tremendous professional restraint in completely passing over the initial remark in your post relative to your sister-in-law. I can understand how lonely it must get where you are.

I don't know if an amp is anywhere near being the right answer. Is this DVD the only one you are having trouble with? Have you borrowed, rented or chacked the same DVD out of the library for comparison? It might just be that the DVD Player or receiver is a little under the weather.