Literally, upgrade CD!
There are still a number of variables:
a) CD has been manufactured with a defect;
b) CD was recorded with a defect;
c) CD-player has poor or bad analogue end;
d) CD-player hasn't sufficient drive for your headphones(btw which ones?)
There are still a number of variables:
a) CD has been manufactured with a defect;
b) CD was recorded with a defect;
c) CD-player has poor or bad analogue end;
d) CD-player hasn't sufficient drive for your headphones(btw which ones?)