Most powered speakers use OEM amplifier modules that are self-contained units with their own power supplies - and fuses. Convenient for the manufacturer, but it means you have to open the box to get to the fuse. Even then, you might find that the fuse is an odd type that has to be special-ordered from overseas, or is soldered rather than in a clip. But if that's the case, any competent electronics technician can deal with it for you.
Worst-case scenario is that the fuse didn't blow fast enough and the power supply is toast, in which case you're looking at shipping the speakers somewhere for repair. But that's a much less-likely scenario.
BTW, regarding surge suppressors: most "surge suppressors" are utterly useless. Best-case scenario is they protect you once, and then cease to be surge suppressors from then on. Worst-case is they don't react fast enough to protect your equipment. A $10 power strip from Home Depot may proudly advertise surge suppression on the label, but don't believe it. Good surge suppressors typically cost more than a hundred bucks. Look for one that has an indicator light that tells you surge suppression is still working.