Come on guys! Don’t turn this into another caraudioforum where you get attacked if you don’t word the question right or ask the right question. This place will die out if that happens.
Queef, I’ve experience what you call SBIR, also referred to many times as a null on DIYMA that in my case causes a big dip in the response around 500 Hz that no amount of EQ can fix. Where did you come up with that graph?