I assume that your cd player has a variable output so that you can control volume. The sound will depend on the quality of the volume control of your cd player, length of cables it needs to drive and whether it's output is powerful enough to drive your power amp. It can work but in most situations a preamp of some sort will sound better.
Running a CD player directly into power amps,
good, deleterious, dangerous or simply stupid? Since I never listen to my tuner, and am too lazy to bother with vinyl anymore and never got that tape deck (thank God!), can I go the direct route? An "audio consultant" (a.k.a "salesperson") told me it was unthinkable because of some mismatch in the output of one and the input of the other... He was trying to sell me a preamp. Since, long ago and far away in a different audio galaxy, it was believed that the shortest signal route (all other factors being otherwise equal) would provide the best, least degraded signal, I thought, and still think for that matter, that my idea is swell. A better CD player + a better power amp + new earthshaking speakers and voilà! Am I missing some great truth here?