1olbull
Riding Motor Since 1950
Th resonance you speak of, in my experience is present in my Nexx XR1R, to some degree. Mine didn't do it until I fitted my CES though.
It is recommended by the AMA to wear plugs even with the quietest of helmets, as even the best sound control helmets still exceed 85db on the freeway.
I do not wish to ride deaf!
Just to eliminate wind noise is good for me.
Just sayin' . . .