Crossover setting on Rythmik F12G

While I've been using subwoofers with some form of equalization and or optimization since 1966 I have no experience with Rythmik. The Rythmik Audio Installation seems explanatory for establishing the crossover.  

https://www.rythmikaudio.com/download/F12_PEQ3_Installation_Guide.pdf

Rythmik is clearly a highly regarded designer / manufacture. I'd consult with them before any suggestion I'm offering.

Years ago I was taught that a subwoofer/s location were always room dependent. I've been placing a subwoofer at the listening position, running a low frequency cadence through the whole system as an aid in mapping the rooms bass modes now referred to as the subwoofer crawl test. Often this reveals a mode in the vicinity of the listening position which I have found personally desirable.   

I'm sure Rythmik Audio has a valid reason for their front wall location suggestions.

All the best with the integration. 

here is where you ask about all things Rythmik....and the manufacturer pays attention to stuff on that thread and forum. Audiogon has some Home Theater subwoofer info, but it's small time comparatively.

https://www.avsforum.com/threads/official-rythmik-audio-subwoofer-thread.1214550/

Thanks!