You would need a large room to fit them in. Also, they are more for playing loud than playing deep (which makes them more like professional speakers than home high fidelity speakers).
The -6dB point is 45Hz (JBL does not specify the -3dB point). That makes them worse than my little Aurum Cantus Leisure 2SE (original U.S. version) speakers for bass depth with one 5 1/4" woofer, with a -6dB point of 42Hz. Of course, the JBLs are much more efficient and handle much more power, so they can play much, much louder. But my speakers can play loud enough that I find it painful, so that would not do me any good in my room, even if the JBL speakers would fit. It does mean that they would work in an auditorium where my speakers would be inadequate (due to not playing loud enough for an auditorium).
To put this another way, if you wanted actual deep bass with them, you would need that ".1" in the 5.1 system you imagine with them. Of course, you could have a lot of upper bass with just the JBLs. On the other hand, for home use, one could use an equalizer to boost the deeper bass with them to get a deeper response, since no sane use of them in a normal home would ever get near the maximum output of them in normal use.
Also, moving them would be quite a bit of work. They weigh 302 pounds each, without the packaging or grills. In the package it is 383 pounds.
They are, however, attractive in the picture, which is what this thread is about. And, in my opinion, they are much more attractive than most of the speakers pictured in this thread. But I would not want them for my home use.
