Power pass-through, or lack of it, would have nothing to do with anything being blown. All it refers to is that some splitters will allow two-way communications between the cable box and the cable company, and some won't (just allowing signals to come in, but not to go out). Two-way communication is necessary to utilize interactive tv features, such as on-demand programming, and also obviously for internet use.
It's not clear from your post whether or not the ac power cords of the cable box, audio system, and tv are ALL plugged into the surge protector, so that they are protected against surges on the ac line as well as on the cable line. Also, is the computer connected to the audio system? If so, since it is not protected by the surge suppressor it would represent a path for surges to get into the audio system.
Regards,
-- Al
It's not clear from your post whether or not the ac power cords of the cable box, audio system, and tv are ALL plugged into the surge protector, so that they are protected against surges on the ac line as well as on the cable line. Also, is the computer connected to the audio system? If so, since it is not protected by the surge suppressor it would represent a path for surges to get into the audio system.
Regards,
-- Al