Something I found that might stir the tweakers: My preamp has multiple single-ended inputs. I found that input 2 sounds better than input 1 - less veiled and more detail. The preamp is about 5-years old, which may be the culprit. FWIW, it's a Krell KCT.
is it possible that there may be some oxidation in one of the input ? try cleaning with a tooth pick and cramolin, or the cleaner of your choice and see if the "sound" becomes uniform across all inputs.
bigamp, I had the same experience with a Krell KBL. I had been using input 1 but because of system rearranging it was moved to input 4 which was seldom used and it sounded different. Not sure if it was better but different. After some time it seemed to settle in and I didn't notice it any more. Could it be just some settling in time is needed for your ears?
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