I didn't need any correction for the active LFRs in my living room. They sounded marvelous. I needed over 20dB bass correction for M3, 6dB for M50, 15dB for M5 and M100s were uncorrectable.

M2OW and M2 bookshelves don't need any correction either in the living room. And they are wall-to-wall soundstage whereas the actives only give me depth and width just between them.

The actives in the basement are a different story. That's another thread. I just spent 3 weeks eliminating position error.

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