I have considered re-rating the 4 ohm power of the other amp models as well - on a reactive load most 1 ohm Class-D amps don't do a while lot at 4 ohms with 2-3x impedance rises putting the amp at 8-12 ohms most of the time. I think that it was entended for the actual 4 ohm rating including the rise so would it be the power output when it rises to 4 ohms? and to 8 or 12 ohms?