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Well, in context of a full-range speaker, like largest Wilsons or the similar, the answer would be unquestionably no.  Even if we biamp those speakers then the LF still is too wide bandwidth and too geographically bind to the MF section.  The worst case in this example is the people who use closed-bottom LF sections, all those “bass horns”. 

The room dissipates LF, the lower the more dissipation and they try to pump more power LF into the room. However, the closed-bottom LF topology by nature can’t handle more LF gain then it can. So, the people pump unto LF driver more and more excursion but it does not produce more effective LF but only it magnify the amplitude of horn-chocking  and creating the mid-bass boom. Pros deal with is by multiplying the amount of LF sections and it works to a degree but the hi-fi Morons do not get. The worst illustration of the said I saw at the Oswald Mills playback. The guy use old-style stupid RCA very shallow horn with very large throat and twin 515G drivers. Those type of horns with proper drivers as more or less acceptable as upperbass horns, or midbass horns in a VERY small room. The Oswald Mill try to get from them the full lower bass (as it is an open-bottom topology!)  and the room in there is not just huge but beyond huge. The Mill is old 3-floor building with large holes in the floor between the floor sections. So, a combined room at sub 50Hz I would estimate is over 7.000 sq feet and to handle this space with closed-bottom LF topology is beyond laughable.  The actually of sound in there is exactly as it predicted. I think he used twin 845 in PP and they flood the sound with horrible gray gag of the overloaded closed-bottom horn. Thankfully the guy in there is so fucking stupid and so senseless that he does not able to understand or able to acknowledge it, good for him. I have seen a few other attempts of to do the same with absolutely identical results…

However, I presume that if to find out what lower frequency a room still can handle – let say 50Hz. Then to beef up a bit the suspended floor with sand to have let say “6dB suck out reserve” over the 50Hz. Then introduce the proper 50Hz horns, I mean the proper hors with no cheating. Then introduce an open-bottom LF section with 40Hz low-pass, the section that would topologically would able to care high gain and high power… I think in this case it would be possible to offset the suspended floor problems.  BTW, what do you think I decided to keen the direct-coupled B2 amp?

Sure, the open-bottom LF section with powerful amp (how about 300W SET) doe open a possibly but the biggest question is if the benefit of longer reverberation time at LF might be used in this configuration. I do not have an answer. I never people talk about the subject sensibly as well. So, it is more blind shooting with suspended floors.  I guess a right solution need to be found with respect to a given space and a given floor. I am sure it would be fun to have a room sitting right atop of concrete slob but it is hard to find and am not willing to build a room in basement but I want it to be in living space. This week I saw one ranch that had no basement and the description said that it was sitting on solid slob.  Upon visit the house I leas the it had a horribly -bouncing suspended floor raised a feet above ground. Sure, for the normal people it means: “sitting on solid slob with no basement”. For me it means:  ”a house with horrible suspended floor with stupid ultra-low height useless basement”. I guess it is not fan to be my real-estate broker…

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