Hello all KSP400 owners. I am happy to see many people own these speakers. As I mentioned a few minutes ago I found a place to repair the plate amp and will let you all know how I make out. Just in case, has anyone tried to replace the stock KSP400 plate amp with an aftermarket amp ? If so what amp did you use, how did you hook it up and what were the results. I have grown tired of repairing the stock amps. Thanks in advance. Johnny D