I just picked up a pair of KSP-400's and am loving the sound. One of them does have the dreaded hum issue, but I've got a friend who is going to fix that for me. He and I have read the posts about that, which have been very helpful. I was wondering if it wouldn't be a good idea to go ahead and replace the caps on the crossovers while we were at it. Has anyone on here done that to the KSP-400's, and did it make a significant difference in sound? As I said, I'm loving the way they sound now, but I am pretty new to higher end audio, so not sure if there is more to be had out of these speakers. Thanks for any info.