Theoratically nearly right.
But it depends on the signal's transient (wave form)
Clean high wattage low and steep signals (with a high deflection like in the first Phase of the profiling-algorithm where the rumblin sounds occur) may damage especially old (and loose) Speakers by forcing the voice coil to move pretty far out of the magnetic-gap, so that the wire-Isolation gets damaged by touching the magnet when the Membran is pushed back.
So I would be careful with older Speakers which membranes have a higher deflection due to looser glue and aged wire-Isolation.