Speaker cones and cushions degrade over time and can sound badly distorted or weak.   It's also common to 'blow' a speaker by driving it too hard with an amplifier that is not matched correctly to the speaker's power specifications.  While to voice coil/speaker cone may be damaged and unusable, the frame and magnet are most likely in working condition.  Resident Noise can find the appropriate parts and fix your broken speaker while keeping otherwise usable parts out of a landfill. This is a finicky and labor intensive process, but it can usually be done for less than the cost of a new speaker.  It's also a great way of keeping your vintage amplifiers original speaker working at optimal capacity.