HELP slight floor vibration auditory vibrate noise

I have slight floor vibration on my wood floors and a small amount of auditory vibrate noise when I play loud. I am listening on my chair on a shag rug in living room.

The sound is otherwise excellent with no boominess and very transparent sounding.

I use Reference 3A speakers that go down only to about 38Hz–20kHz, +/-3dB.

I hear this even when not using my REL R218 subwoofer although slightly less so.

Is it bass around 40-60 hz doing this ?

I am concerned that corner bass traps may be overkill?

any thoughts?

thanks in advance

Michael