Short of installing lightning arrestor system to keep lightning from hitting your house in the first place, nothing will protect your electronics from a direct lightning hit to your house or the service entrance; however, a few basic precautions will go a long way in minimizing damage from a nearby hit.
First is to make sure that all grounds are tied to one place at the service entrance and it's a good ground with at least two ground-rods pounded deep in the ground. Cable and satellite TV installers are notorious for sticking a ground rod in wherever it's convenient with no bonding whatsoever to the house's service-entrance ground. When there are two grounds, one at each end of the house with no direct common bonding, a lightning-strike occurring nearby can crate a high-voltage unequal-potential between the two separate grounds. Guess how the potential balances itself out? That's right. Through the lead-in coax and through your TV and anything else that is connected and grounded or tied to the neutral leg - which is everything that's plugged in! So check and fix your house ground first and foremost.
Now, like Swanny said, go out and buy or rent through your electric-service provider a whole-house surge-suppressor. Don't worry it would hurt the sound of your system and it's worth every penny.
Also remember that MOVs, which actually do the surge suppression in most strips and power conditions, wear out with age. Depending on the number and size of surges that are absorbed by it, figure on replacing the MOVs in the device every four- to eight-years. MOVs are quite cheap but require some soldering to install. You may be quite surprised open your power conditioner and see a blackened and burnt MOV or two, but it not uncommon, especially here in Florida.
First is to make sure that all grounds are tied to one place at the service entrance and it's a good ground with at least two ground-rods pounded deep in the ground. Cable and satellite TV installers are notorious for sticking a ground rod in wherever it's convenient with no bonding whatsoever to the house's service-entrance ground. When there are two grounds, one at each end of the house with no direct common bonding, a lightning-strike occurring nearby can crate a high-voltage unequal-potential between the two separate grounds. Guess how the potential balances itself out? That's right. Through the lead-in coax and through your TV and anything else that is connected and grounded or tied to the neutral leg - which is everything that's plugged in! So check and fix your house ground first and foremost.
Now, like Swanny said, go out and buy or rent through your electric-service provider a whole-house surge-suppressor. Don't worry it would hurt the sound of your system and it's worth every penny.
Also remember that MOVs, which actually do the surge suppression in most strips and power conditions, wear out with age. Depending on the number and size of surges that are absorbed by it, figure on replacing the MOVs in the device every four- to eight-years. MOVs are quite cheap but require some soldering to install. You may be quite surprised open your power conditioner and see a blackened and burnt MOV or two, but it not uncommon, especially here in Florida.