Summary: I use 6 of these along with two powered subs every week for around 14 hrs/week. I have replaced three circuit boards because of overload. It costs around 100-150$ to replace the board with higher end components. There are several places that you can send them to for the repair or you can buy the board and do it yourself if your techie that way. It is the most common problem with these speakers. While it can be a pain sometimes they are still worth the money.