+1 @nonoise - completely agree.
I just had a fuse blow in my Krell and had to re-order another Furutech. While I was waiting, I decided to put back in the stock fuse. After 15 minutes, I literally could not listen anymore. It was completely unlistenable! I put in a spare Isoclean I had lying around. While it did not have the resolution of the Furutech, it was so much better (significantly) than the stock fuse!!

