Yes correct , Btw dont boost bass nulls +12dB, they are very likely some form of acoustical cancellation so you would not gain much you will just dump energy into the "hole" and blow up speakers . Dito for trying to boost sub bass out of speakers not capable, especially if the speaker or sub is bass reflex !
However subjectively it can be so that when you cut the bass peaks in the room the general sound might subjectively bee to lean so some general low shelf with low Q to "fatten up" the whole bass area by 2-3 dB as some mild loudness can be nice