It sounds like that, but it sounds fine on other songs (no distortion). It's just certain frequencies are just right to cause all the rattles.
Some songs there's no rattling, some songs only hit those frequencies occasionally, other songs the whole song is just a mess. So I really don't think any speakers are blown. It's loose stuff on the backside of the door panel.
I've installed my own high end audio systems in boats, RV's, cars, etc. I use pretty high end gear (JL Audio, Focal, etc) and I know what to listen for, and this just mostly sounds like there's a bunch of rattles.
It's a real shame, because the McIntosh system is otherwise absolutely excellent for an OEM setup (bass heavy on some things at mid volume, but EQ fixes that).