Is there a way to trim the sub volume when in stereo mode? I know you can use the test button and punch enter twice to adjust it in dolby, but it doesn't seem to let you do that in stereo. From my experience the only speakers that can be trimmed in stereo mode are the mains. Correct? Kind of a bummer if that's so, I'll bet the majority of users employ their sub when listening to music in stereo.