Hi @toddalin - Every passive crossover is an EQ, but that’s really not what I wanted to discuss especially as most hobbyists aren’t going to mod anything about their passive crossovers.
While we can, generally, adjust the speaker to the room to match output with room gain what we can't really do efficiently is deal with narrow room modes. I mean, it's possible, but then you end up with a very custom speaker that only works in one place with probably a large extra outlay in parts.