You can, but it needs to be a CD player with a built-in volume control (otherwise you need to use an outboard volume control, passive preamp, or active preamp). It will sound best if the built-in volume control is a good one (preferably analog) and the output of the CDP is a good match for the input sensitivity of your amp.
This topic has come up quite often. Search the archives for CD players with volume control and you should find a bunch of info on this topic (and many CD player recommendations too).
This topic has come up quite often. Search the archives for CD players with volume control and you should find a bunch of info on this topic (and many CD player recommendations too).