Sorry. me chiming in again. Labtec is right of course about how out of phase pink noise should be presented. Also, to be frank, your system is not exactly state of the art and especially CD from the eighties until about the turn of the century might, when played through it, sometimes sound as you had described.
However, I would suggest, that before you start exchanging gear, I would check at your next visit to the specialist, if you've started to hear one sided. It may not, as Labtec suggests, be just your gear, it may well be your hearing, although age induced hearing difficulties generally lead to loss af hearing in the upper frequencies, not to perceived distortions. But again, I strongly suggest, to clear up this question first with a specialist, before you tear your stereo apart.
However, I would suggest, that before you start exchanging gear, I would check at your next visit to the specialist, if you've started to hear one sided. It may not, as Labtec suggests, be just your gear, it may well be your hearing, although age induced hearing difficulties generally lead to loss af hearing in the upper frequencies, not to perceived distortions. But again, I strongly suggest, to clear up this question first with a specialist, before you tear your stereo apart.