The replaceable module in surge protectors is composed of MOVs.
Metal Oxide Varisters. And they aren't expensive.
From Digikey
http://onlinecatalog.digikey.com/WebProject.asp?CodeId=7.4.4.35&BookCode=dsu&PageLabel=2138&from=2#
It's not quite true that they can protect from 'only 1 surge' but there IS a limit and they do 'wear out' from repeated smaller insults.
If I lived in a lightning prone area....say Florida, for example, I'd have a whole house surge protector backed up by point of use MOV systems.
And than be ready to unplug during really crumby weather....like all summer to use Florida as an example, again.
My power conditioner will shut things off if power goes below.....95vac, if I remember rite.
Pauls Battery backup suggestion for sag prone areas is tops.
A possible solution would involve a RELAY between amp and speakers. It is latched ON by house current. Voltage drops.....relay disconnects and amp caps can discharge at there leisure.
Metal Oxide Varisters. And they aren't expensive.
From Digikey
http://onlinecatalog.digikey.com/WebProject.asp?CodeId=7.4.4.35&BookCode=dsu&PageLabel=2138&from=2#
It's not quite true that they can protect from 'only 1 surge' but there IS a limit and they do 'wear out' from repeated smaller insults.
If I lived in a lightning prone area....say Florida, for example, I'd have a whole house surge protector backed up by point of use MOV systems.
And than be ready to unplug during really crumby weather....like all summer to use Florida as an example, again.
My power conditioner will shut things off if power goes below.....95vac, if I remember rite.
Pauls Battery backup suggestion for sag prone areas is tops.
A possible solution would involve a RELAY between amp and speakers. It is latched ON by house current. Voltage drops.....relay disconnects and amp caps can discharge at there leisure.