I was messing around with a powered sealed sub a friend has in his home theater setup and found something interesting that I wanted to ask about. It is a down firing configuration normally and it pounds when set up like that. I turned it on it's side and it sounded ok but when fired up there was a dramatic loss in bass response. It, frankly, sounded terrible. Is this something inherent to sealed setups? I have seen car setups with sealed up firing subs so I am a bit confused as to why a person would do that if they will lose bass like that.