I can say to the debate that the Acoustic Energy Reference range of speakers excel in the bass response.
l am only using the reference 1s in a second system and their smallest speaker. The rear port can be tuned using the supplied baffles limiting the roll off point that varies with placement. The reference 1s are the only ‘small’ speakers l have owned myself that do not need a sub. The only other example l have had also that had this same effect was a pair of larger stand mounted Mission 770s in the 80s.
l can not say the Reference 3s will be the same, but highly likely.