Oh boy, I guess this conversation is a museum piece . Representing the old gaurd and thier suppositions and the bloodied generation of little 'e' engineers fighting both artist and systems (mis) providers.
None of those bands have low bass in thier music. It isnt thier style, even mainstream hip hop lacks decent bass. Thier old school roots tend toward the thump of a cheap drum machine kick.
So I guess you won me over. Mainstream arena music sports the frequency reponse of a yamaha ns10. You are right-if you are filling the rider for mainstream you may as well send out empty sub cabinets.
Even the Boston Pops could save money by leaving thier subwoofers at the next truckstop. More room in the trucks for lot lizards.
I am curious why even participate in a conversation about improving subwoofer performance. Wouldnt you be better served, wringing better response from a one box does all system?
You have data to prove that for all intensive purposes, a sound system only needs to go as low as 65 hz.
Albeit, at best you would have a "tight" 65hz coming out of a one box system, but from what I see in your data, who cares?