What are ways to fix speaker dips in my speaker or audio room

Well, did he make recommendations for what he thinks you should do? He has analyzed your room and I would follow his advice rather than ask us who know nothing about your room.

DSP and bass traps (you can use them together, BTW) can help to correct the room response. If your room has a lot of reflective surfaces, use rugs, curtains or other treatments to reduce room echo.