The fuse is not the problem on 1st generation KSW-12's.
I know for a fact that the manufacturer of the amplifier has been changed at least once if not twice, due to poor quality. The amplifier that is in the new KSW-12's has better components and is built a heck of alot better. I had the same problem and had to buy a new unit after having mine for only a year. (Purchased over the internet) I went to the manufacturer of the amp and tried to buy the piece from them without success. There is more to this than meets the eye. Changing the fuse value from 1.2A to 1.5A is trying to cover up a quality problem. Klipsch should step up to the plate and help out the owners of the 1st generation subs. They will loose a few loyal customers, myself included.