thanks, unfortunately all 4ohm measurements, and i should have specified above about wanting to know if the 3A used in Amirs 48V test was 'current' limited for the 8ohm measurements (as i have 8ohm speakers)
meaning if going to a 48V 7.3A PSU, that you'd exceed the 61W@8ohm measured by Amir with the 48V 3A
however, after reviewing that thread, a lot of folks have said to avoid 48V entirely, something like 42-45V would be more appropriate to keep heat down. i know jlesterp recommends 45V for his tpa3255 boards likely for the same reason