Alon Wolman wrote:

I am currently using a 30wpc Luxman LX33 Tube amplifier with
Vandersteen 1C speakers and a Panasonic DVD/CD Player DVD-F65 5 disc
changer. Will upgrading the cd player make a big difference in the
sound? What is a good cd player with a warm, sweet sound for jazz?

Sorry that your amp speakers and listening room aren't providing the warm
sound that you prefer. If you want to buy a new CD player in a futile
attempt to fix the rest of your system, be my guest, but it's a study in
futility. You've got some nice speakers, but the room is apparently not a
good match for it. Try toeing-in your speakers to get a smoother sound.
Consider adding furniture, more carpeting, heavy drapes and other wall
hangings.