I recently purchased a Musical Fidelity A3cr preamp, a few days later I got a good deal on a second hand Raysonic CD128. After settling in for a few days, I started noticing a disturbing problem, higher frequency sounds like female vocals, organs, guitars etc, were starting to come through with a slight amount of distortion. It reminded me of the effect that results when you listen to a low bit rate MP3, not as extreme but in the same vein. I found that it is not as audible on some CDs as it is on others. I began to try to narrow down the issue, I tried playing the same CDs on my Oppo player and got the same distortion. That meant it didn't appear to be the new player or the CD input in the preamp as I have the Oppo connected via the SACD input. I then tested out some LPs and found that no matter what I played there was none of the distortion that I had heard listening to CDs. I even tried playing the same albums on both CD and LP and found that the distortion was present on the CD but not the LP. I have the TT connected to the preamp via the Aux1 input as it's going through an external phono preamp. I then tested the TT using all the other line level inputs with the same result, no distortion. After all this, it seems like the preamp is over-amplifying the line level signals coming from certain CDs. I wondering if anyone has every experienced this sort of problem and if this sounds like something that would need professional service to fix.