I agree with Lak's comments, you can't generalize because it all depends on what combo you are comparing with what cd player. Right now I use an Acurus ACD-11 as my transport as a lot of time and expense was put into that unit's air dampening system to reduce the effects of vibration and in turn jitter. The technology on the electronics side is now a little dated and so I run it with a DAC to for instance decode HDCD recordings. It is likely that if I upgraded to a current single CD player such as the Cambridge Audio 840c I would hear a sonic improvement but it would come at a monetary cost.
