please allow me to express my modest opinion about subwoofers. I am owner of pair of Omega HO SAMs. On paper they start from 38 Hz. Your CAMs start on paper from 42 Hz I think. When I tried to check the speakers with below application: https://www.szynalski.com/tone-generator/
the speakers played even lower frequencies than 38 Hz. Recently I have finished my 7 band Spectrum analyzer, which shows me the visible reaction on the 63 Hz and 160 Hz of the audio signal in first two bands. https://www.youtube.com/watch?v=DqJKDJ-LXT0&t=6s
So I can visually recognize the lower frequencies of the music. I was very surprised, that most of the music I listen to does not excite the first 63 Hz band much. I mean rock and pop from 80-ties and 90-ties. O
Only if I play some new music, mostly electronica, the lower frequencies are presented much more in the music. Maybe because the production of this kind of music is probably done with electronic devices only, nothing like real drums.
I came to the conclusion that I do not need to hear anything below 38 Hz. I find it is helpful only for watching movies, just for explosions etc. But is not my case.
The biggest advantage of FR speakers is no need of a crossover. Therefore I think that to add a subwoofer to the SET amp and FR speakers is a step back.