You could of course not only equalise but try some phase adjustment at the specific frequency which has the longer reverb time. By letting that frequency play slightly before the rest of the audio you can get the highest amplitude peak (in this case reverberant sound built up after the direct sound) to be in closer time with the rest of direct sound.

This causes a 'pre echo' from the direct sound but in the case of bass with a lot of delayed room build up, is not very noticeable.

Anyone know if TACT offer phase correction? I know they do time alignment of the subs with the main speakers but do they do frequency specific delay to fix phase issues??