I did a comparison side/side of the onwall 22's and regular m22's. The regular M22's put out more bass bacause of the larger cabinet, and I settled on a 80hz crossover. The onwall 22's sounded very close in the upper and mid frequencies. For me a 100-120hz crossover worked best for me.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB SonyUBPX800