Whole house surge protectors employ either massive MOVs, silicon avalanche diodes (SADSs) or a combination of the two from hot to neutral, hot to ground, and neutral to ground. The Leviton whole house surge protectors claim to employ the use of solid state TVSS devices, which probably means SADs.
Whole house surge protection
I'm thinking of having an electrician install one of these devices at the service entrance of my house. I get frequent thunder storms. Does anyone know what these are made of? Do they use inductors? Reason I'm asking is I do not want any device that can limit dynamics of my audio system. I've looked into ZeroSurge, SurgeX, etc that use SMP, which seem to be ideal compared to devices using MOVs. But all of these use inductors..and some who have used this type of technology have complained of dynamic restriction and collapsing of soundstage. Thanks.