A lot of good points brought up for you Carl. How many hours are on the speakers? Break in is a roller coaster ride for the first 400+ hours. The "dirty" power could effect your phone stage more so then any other component- its certainly possible(and Carl is in Boston, or at least I believe he is). Another potential problem could be with one of your ceramic midrange drivers, on my friends midi grand's he had crack's in one of his drivers which caused the system to sound VERY inconsitent and it was more noticeable with vinyl then digital. The cracks would be VERY tiny and hard to see, look through the grill with a flash light around the edges and see if there are any hair line cracks. I am by no means a vinyl guru so I will leave that up to the others! :)
Congratulations on the new speakers!
Congratulations on the new speakers!