hey ousooner, your chart isn't quite right, sorry. The scale is wrong for starters, Hsu, following CEA guidelines, uses 1 m burst tests for their measurements, the EMP subs were not tested in the same manner, and the performance difference between them is not nearly as large as you have it. If it was, there is nothing to even consider, by the differences you have the Hsu subs would be hugely superior to the EMP subs. Remember a 6 dB increase is a doubling of loudness, so were sub A 6 dB louder than sub B with everything else being the same, it is effectively like two sub Bs.