All speakers (drivers), regardless of brand name, fatigue with age. That is, the voice coils on the drivers sag which affects the sound quality. This will occur in virtually every driver (speaker) that is 10 to 20 years old. The obvious remedy is to replace the drivers (the least expensive method) with ones of the same size and impedence.
You will notice a difference in sound, and the new drivers will more closely approximate the sound of the speakers when they were new. There are lots of websites and retailers who can supply the new drivers, perhaps even better quality than the ones you have now. Here is one place to start: http://www.partsexpress.com
You will notice a difference in sound, and the new drivers will more closely approximate the sound of the speakers when they were new. There are lots of websites and retailers who can supply the new drivers, perhaps even better quality than the ones you have now. Here is one place to start: http://www.partsexpress.com