Have you been keeping the cabinet and the drivers clean?
When was the last time you cleaned both ends of the cable terminations
and the speaker posts? When was the last time you snugly tightened
the screws of the speaker cabinet?
Have you made any changes recently to the room in which you
use the speakers? New carpet or carpet removal, different furniture
and furniture placement, different wall and lighting fixtures? Do you have other unused speakers in the same room?
When was the last time you cleaned both ends of the cable terminations
and the speaker posts? When was the last time you snugly tightened
the screws of the speaker cabinet?
Have you made any changes recently to the room in which you
use the speakers? New carpet or carpet removal, different furniture
and furniture placement, different wall and lighting fixtures? Do you have other unused speakers in the same room?