lonemountain: You are talking about professional applications and not what's being discussed. See 2:20 on link: The best way to connect a subwoofer (youtube.com)
BTW: I have several systems, both HIFI and professional and I know what you mean. They are all connected differently and speaking for myself, the difference is an audible improvement if connected as described in the video! Try it! This video will clarify my post. Thanks for your input.