I don't know what those terms are referring to. If the amplifier output stage is properly matched to the speaker load, it will operate correctly up to a certain output properly within the defined maximum distortion parameters. If there is a mismatch, it will not. If a speaker is driven with more power than what it is designed for, damage can occur.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!