Last year I lost an Adcom 555 (200WPC x2) amp and after playing the damaged unit for a few minutes I almost blew some tweeters in a very prized set of 4312s located in a basement system.

Apparently, the amp was spiratically dumping DC into the output circuits on one side.

Upon further thought, the amp was not protected by electronic surge protectors (e.g., the electronic extension cords commonly used for PCs, TVs, etc.) and I suspect a thunder storm may have caused the damage.

Is the use of surge protectors a good idea? I have also heard they are not full proof.