AR 9 LS Speaker Protection question

Question : Do these AR speakers have Relay Speaker Protection ?

I dropped my needle on a vinyl record while playing on loud volume...this made a loud feedback noise.

The left channel of my AR speaker quit working.

I waited awhile and retried playing record ... it played normally on both channels !

My Amp is a Bell Canto one C5 i . Could this have occurred because of Amp protection ? or ...

Speaker protection ?

Your thoughts please

Thanks