I hate it when people make guesses at how much power a sub is getting because it had "good electrical" There are so many factors involved in how much power the sub actually sees. Your theory only would hold water if the person was playing (most likely 0db 50hz tones) then it would be at 1500w if he/she tuned it to that. Most music is -6db so that supposed 1600-1700w wouldnt even remotely be possible unless they tuned a 0db 50hz tone to over 2300w RMS.. NOT LIKELY..
So if a 0db tone was used, then on daily music the sub on average will only see 1100w and even lower depending upon the track.
not bashing but people need to know.
my 2 c.