I was formerly in the high end computer sales business. There are only 2 "over the counter" surge protector brands that actually do anything . TrippLite has got a lot of mention above and I totally agree. The other brand in Panamax. If you don't have one of those I consider it a power strip. I'm sure there are Audiophile grade products that do a great job, I'm talking regular "over the counter" surge protectors.
Surge protector
This morning we had a power surge. First one I ever experienced. It knocked out the sub woofer components of my GoldenEar Triton one speakers. In my ignorance I had them plugged into the wall rather than a surge protector. Soooo it blew the amplifiers in the sub woofers. It’s going to be a costly proposition: $500 for the amplifiers plus God knows how much the dealer is going to charge for coming to my house. (He’s very reluctant to do it, wants me to lug the 80 lbs speakers to the store.
Meanwhile, I’m having to listen to bass-less speakers for the foreseeable future.
So, the moral of the story is plug everything into a surge protector.