Now JohnK... That might be true if your single disc and multi-disc player both used identical pickup, electronics, amp, DAC, and output circuits. But please don't try and tell me that a $150 6-disc Sony changer is going to sound 'audibly identical' to a $600 or $900 JoLida single disc player that uses tubes in the pre-amp output stage. If you are using the digital output on a CD player then you are more likely to get similar sound since you are using the exact same DAC (the one in your reciever) However some CD players handle error correction and such differently and will produce different sound even out the digital output. But if you are using the analog outputs all bets are off, because some use really crappy (and probably cheap) DACs, and others use good DACs (HDCD capable, or Burr-Brown ones come to mind) that cost more.
