Belle Klipsch Maintenance

@sneem You do not have to do anything. The grill cloth keeps dust out of the horns and what happens in the "chamber" means nothing. I would vacuum it out maybe once a year. It is very tough to hurt horns. You use an upholstery brush to vacuum off the grill cloth. You can also use a foam carpet cleaner on the grill cloth.  

Thank you, mijostyn for your reply.