I had just ordered a Furman Power Factor Pro, before seeing this thread. The reasoning was mainly to protect my amp. I have been using a power strip to provide spike protection.
I'm sure that everyone has seen ugly to scary power outlets at venues. Our practice area seems to be fairly good in that respect, but it seemed like this would be a good investment. I do hope that it reduces transmission noise and provides a more even flow of current. If it improves the amp's performance in any way, then that would be a bonus. I'm really not expecting much, though.
Has anyone actually experienced any noticeable improvement in your amp's performance when using one of these? If so, what where the audible differences? Does this only apply when you're cranking your amp?
I've never used one of these before, so I'm thinking that a power conditioner is more for protection from what you can't see vs. actual tone improvement that you'll hear. If you can hear a difference, please tell what you've actually experienced.