Many power amps don't care much unless the surge is extreme- tube amps can be vulnerable because they increase the line voltage so much for the plates and if the caps aren't rated for high enough voltage, they can go away. Hopefully, the fuse blows, but who knows? Solid state amps don't work with such high voltage, so the effect is less. Many surge strips, protectors and so-called 'conditioners' can limit current if the amp isn't highly regulated and some have outlets marked for amplifiers and some have one for Subwoofer (or, just 'Sub'). Haven't opened one, so I don't know what is different.

I installed a Furman Elite 15PFi ten years ago- not a single piece of equipment has had a problem and I have been in the equipment room during thunder storms with lightning strikes that were very close to the house.