I finally sold my crappy Bose and will be without speakers for awhile. In the meantime I thought I would still use just the Sub I kept(HSU) to give the TV speakers a little pep. Not sure how to adjust for the volume. I calibrated it with a sound meter to 80db but it seems to loud and distorted at times. Is my receiver sending more bass than it should with no other speakers attached? I still leave it on 5.1, but not sure if I should put it at stereo. Any help would be great.