The negaive numbers shows you that the system had to drop those frequencies to try to smooth out the frequency response, so the FR of the RF M60 has a high point that required a -6db drop to bring it in line and at 500hz a 3db boost so on down the list. This is what the program is seeing in your room and it is your room/speaker placement that is causing the problem, not the speakers.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70