Mercury Sable Forum : “what are the specs on the speakers? not size wise but general information?”

It really depends on the vehicle itself.  Mfgs. often use different speakers depending on what stereo option was purchased, etc.  I would suggest talking to a Ford dealer parts department to see what specs they have available based on your VIN number.  You don't have to buy from them, but a friendly parts guy can tell you a lot of stuff.  Sometimes there are even mid-year changes and that will hinge on your VIN -- suppose Ford got a deal from Infiniti or Bose, for example, on some speakers halfway through the year, and switched production.