Page 10 of the manual at the following link gives some tips.

https://axiom-manuals.s3.amazonaws.com/N2_1.2.pdf

If you can't make it work, contact Axiom and tell them you want the wired M100 - if that works for your space.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated