I suppose knowing the weights going in can set a basis wrt to usage / placement / anchoring and the actual physical structure involved . .
everybody's place is different
and there isn't any one of us who hasn't needed / advanced from an extra hand and constructive / imaginative engineering every now and then
but making the weight a factor for the performance of a speaker, yeah, not feeling it - .02
don't think that's a prominent factor when these designed were birthed
when I had the thought and experience that the 15" SEOS horns are totally F'n awesome, and that as maybe those horns in a pair of surrounds couldn't be anything but synergistic in terms of adding to the overall mojo of a system, especially at about 70-75-80 ahead of the MLP
i replaced the F4's with a pair of nice thin 88 Specials.
at 52#, getting them onto the right place and permanently so seemed like some sort of challenge, considering we all want(and sometimes get) universal flexibility (NOT Flexigirls!) for optimal speaker swilt and tivel aiming.
my on wall solution was a pair of #3411
full motion mounts (monoprice) and 9" hangman strips for plop on /plop off ease and assuredness. serendipitously, the studs were in the right place but i was prepared to go to a load plate if needed wrt placement . .
so if the speaker is suitable for both performance and budget and placement options,
the weight becomes secondary and 'dealing' iwth it is just part of the fun . .
Submaximus V3 weighs about 350#. a beefy refrigerator dolly and 2 other guys and my modded dolly it sits on,
a paragon of domesticated speaker for staying where it is put: SIT!
so if the OP needs help wrt to plaecement / whatever due to the weight,
The AVS community is world wide and helpfulness a mere question or 2 away