Definitely keep those on.
You don't want to end up like me - I really forgot where I've placed mine and cannot find them for the past several years.
She loves me she loves me not!
So - as in the saying above when de-pedaling a daisy...
Speaker grills on speaker grills off.
The reasoning for my question if I keep them off inevitably I will damage them moving them around when in the garage- -forget where I put them - and bitch cause they take up space.
Thank you for the education.