Depending on how much it is, you can always try it. I myself have a side firing subwoofer, which sounds like its just as bad as a down firing.
As far as the sub goes, I know what you mean. I have to turn mine off frequently. I live in a house that was converted into a duplex. So I just wait till the neighbor leaves, who happens to be a 30 something single overweight school teacher who couldn't be further from a music lover.