how can i fix my cd /radio in my mondeo 54 reg?

my radio /cd in my mondeo displays all the relevent info track number volume
time elapsed radio station band width etc etc but no volume is heard unless you turn up the volume to 30 (max) and then rest your ear to the speaker and then you can hear the faintest of sounds any help would be apprieciate thank mick ps the mute is not on