House surge suppressor installed at the meter

It has been posted that installing a whole house suppresor at the electric meter by the energy provider can protect your house from a lightning hit.
I tried to get more info on the thread but wasn't successful it was a little off the thread topic.

So, I thought a seperate thread with that topic would be useful.
It seems to me that with all the money I have invested in my Audio system if this would really protect it, it would be worth it.

However, I have never heard of such a unit being available.

Can anyone provide more info?
Such as,
1. has anyone had a unit like this installed ?
2. What are the claims for protectiom ?
3. Price.