Tried looking for a used MF M2 none
It's not about hz it's about tightness,firmness,dynamic,control...
I can hear 30hz, 35hz is def louder,70-80hz slightly lower than the other frequencys, mabye also 85hz,95hz has a little peak.
May sound alot different when playing real music instead of test tones and how the different inginers,musician,producers are mastering a record,cd
My amp just isn't as good as nad amps in the bass, they need a little oomph,more weight, theres no need to buy different speakers that my yamaha amp can't get most out of in the bass region
My older nad amps did introduce hum (the amp itself not thru the speakers) i would have used one of the 2 older nad amps i have if they didn't have hum.
With the same music nad just plays bass with more weight than most amps (better)
This is okay, i just don't have to try it,test it to know that one of my 2 nads i have will do it better in the bass than my Yamaha
Can't remember what speakers i used with my Marantz PM6005/6006 BASS i think i changed to a nad c326bbe which had more bass but got hot as if it was a class a amp,mabye it lacked some subtle details in the highs which i thing the nad c355bee also did in the highs
I think i used dynaudio emit m10 with my PM8005