The room is reacting to the driver not the driver reacting to the room.
i attached a third octave graph with a 75 hz crossover no filters! This shows a flat response with a bump at 80 Hz. DSP can handle this no problem but no modes of relevance. This is with the MS-6P at wall floor boundary and microphone on the other side of the room about 3ft from the wall. I don’t focus on small variations within each band. Spectral response is based on our hearing and is a standard especially in room measurements.