Rattle could be one of the following:
1) Vibration/rattle of nearby furniture, wall hangings, wall or floor
2) Vibration/rattle of a loose speaker grill
3) Driver could be striking/rattling the speaker grill with long excursion if over driven (reduce the power if this is the case)
4) Blown driver
Check all possibilities before replacing the driver.
Good luck!
1) Vibration/rattle of nearby furniture, wall hangings, wall or floor
2) Vibration/rattle of a loose speaker grill
3) Driver could be striking/rattling the speaker grill with long excursion if over driven (reduce the power if this is the case)
4) Blown driver
Check all possibilities before replacing the driver.
Good luck!