Your math is incorrect. According to the
SPL calculator, a single 84 db speaker at 4 m (13.1 ft) hits 87 db at listening position. When we change that to three speakers, and put them near a corner with their maximum power handling (160 watts) we can achieve 104.8 db. That is loudest their front stage can possibly get at 4 m (you will also need three 90 degree corners in your front stage, lol). That isn't to say that is not loud though, that is very loud. However,
I have a feeling they won't be sounding too great at that point. You also have to wonder about their dynamic range with such a low sensitivity. On the other hand, I haven't heard them personally. Honestly, I don't think they would be awful speakers, and I think they might be nice for near-field speakers or for people who only listen at modest volume levels. As for myself, I like to let my system blaze every now and then, and while I would love to own some SVS subs, I would not want their speakers.