To Plug Power Amps Direct in to Wall or Not ??

Hello .
I own a number of different power amps. PASS, THRESHOLD and MACs. I have dedicted rooms for each system. And no appliances are tied into the circuits I am using for my equipment.

BIG Questions??

Should you plug power amps directly into the wall or use some type of surge protection ?

Is it safe without protection on power amps even though they are pretty hardy and not sensitive like digital gear ?

I do notice better performance on the power amps plugged directly into the wall. But I am scared of the common surge , brown out or electric goes out may fry my amps.

Or am I being too much of a worry wart.

Thank you to all.
BOB