I use Furman Elite 20PFi conditioner and leave system on all the time. It has positive effect on the sound and very good protection. It uses multistage non-sacrificial protection with circuit breaker. In addition it has separate filters for different output banks including high current bank where my power amp (class D) is plugged.
Lightning is something else, since there is no wire in the world that can conduct 1 foot wide plasma to ground. My relative's house was strucked twice (direct hit). All electrical equipment was damaged and insurance paid for it but when it came to renew they canceled because he was statistically too much of a risk. Statistics as we all know prove that motorcycle accidents are caused by tattoos but that's life. I protected my gear as much as as could. (I could install whole house surge arrestor in addition. It is probably not very expensive and is installed at the box).
Lightning is something else, since there is no wire in the world that can conduct 1 foot wide plasma to ground. My relative's house was strucked twice (direct hit). All electrical equipment was damaged and insurance paid for it but when it came to renew they canceled because he was statistically too much of a risk. Statistics as we all know prove that motorcycle accidents are caused by tattoos but that's life. I protected my gear as much as as could. (I could install whole house surge arrestor in addition. It is probably not very expensive and is installed at the box).