Tripp Lite?

I had good luck with these economical units, well built and they offer some noise reduction as well. 

https://emotiva.com/products/cmx6
 

I have a PS Audio DECTET that took a hit from an Edison power surge and it is no longer repaired by PS Audio (discontinued).

Define surge.Lasting a few microseconds to a couple of milliseconds? Or the overvoltage surge lasted several seconds or more?

No surge protector will protect from a Utility Power Company’s high overvoltage surge lasting more than a few microseconds. Some surge protectors do have over-under voltage protection through the use of a over-under voltage relay that disconnects the unit from the AC mains power. But even then there is no 100% guarantee it will disconnect from the AC power before causing damage. It depends on how high the overvoltage event is. 

Example of an over-under voltage relay.

https://www.chintglobal.com/global/en/about-us/news-center/blog/voltage-protection-relay.html

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Hey.  

Wirecutter rates some Tripp Lite surge protectors extremely highly.  They are the only source of 3rd party testing for surge protectors I know of.  They rate Furman's higher though.  :) Take a close look at the specific models they mention.  Trip Lite has introduced other models since Iso Bar which perform better.  I wrote about this in depth here and a link to the Wirecutter article is in here too. 

I use Tripp Lite surge protectors on most of my electronics. For my audio gear, I use a Tripp Lite voltage regulator/surge protector, and noise reduction unit. It's very inexpensive and regulating voltage is as important as eliminating noise. I already have clean reliable power so it's more than adequate. 

Thanks All, some valuable info here (to me)!