My room had a suckout around 80-100hz. I first used the Behringer DEQ 2496 and was impressed with the results. However, it wasn't the most transparent piece. I then upgraded to a TacT RCS 2.0 and I'm very happy with it. In my opinion, if there is any loss of transparency, it's more than made up for by what TacT can do for your room.
I guess if you can fix your room passively, that would be best. If not, the digital solutions make a lot of sense.
I guess if you can fix your room passively, that would be best. If not, the digital solutions make a lot of sense.