10" bass sections in a dropped ceiling

I am thinking about a living space friendly solution with basically 2-way floorstanders together with a sort of 10" bass sections but mounted in a dropped ceiling. My initial assumption is I'do a wooden closed box that I would finish outside nicely to act as dropped ceiling. I would mount the ceiling more less aorund the floorstanders location so that the distances to the listener are approx. the same. The bass section would be crossed steep at ca 200Hz. In this way I hope to create a sort of virtual stereo speaker pair. It seems a nice idea to me but it rarely appears on the net and maybe there are good reasons for that ? Does it have some important drawbacks compared to 1) integrated bass sections in the same enclosure (except the obious co-location that should not be a big factor for a <600Hz range) 2) a standalone subwoofer located somewhere on the floor ?
And a second question - if the idea is more less acoustically sensible then assumed the dropped ceiling will be adjacent to one longer wall is it better to locate the driver closer to the wall or possibly on the far end of the dropped ceiling and why/how to estimate the effects ?
 
It is likely that you'll want other subs to handle spatial matters from either location. If you want them to play 200-600Hz then you'll have more questions to think about.

Maybe this is an opportunity to add a ceiling cloud to manage your mains reflection..?
 
You have versatility in this range because you can make up with other woofers in different locations.

If you place it away from the wall, you'll start with cancellations from the nearby wall which will get filled by other room reflections or other subs. If you place it near the wall you'll end up driving more modes directly (still ok) which you may need to trim down with other woofers.

These are the same difference if you're familiar with multi-subs.
 
An interesting topic in itself. For modes handling i would imagine there are different approaches. So to my current knowledge for mode peaks we hava a better solution than multiple subs. But it is not easy with mode dips, where multiple subs might be about the only solution but rather together with some DSP ? I think compensating for dips has poor (price+effort+living inconvenience)/audio effect ratio so I would rather go for achieving more less levelled FR for direct sound and correct the peaks. What do you think of such a strategy ? 🙂
But even with multiple subs - flexibility of their xy location in a dropped ceiling seems to be greatest from the practical POV. And yet it seems this kind of solution (dropped ceiling bass) is not popular (if I am right it is not ? 🙂 ) - why is this so ?
 
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