Learn how to troubleshoot. How to re cap. How to use a VOM meter. And save lots of $$$
Learn how to replace rotted foam surrounds. Learn how to set up your sub woofer. Here is a hint. It is very hard to get your sub woofer tuned into the sweet spot in less than two weeks after adding it to your system. Don't throw money at the problem. Use your ears and read about how to set up to get the best out of your equipment!!!!