In reply to:

conditioned air is dry and shouldnt be a problem for condensation


Sorry RCVECC - I didn't mean that the conditioned air was moist, but when you turn OFF the AC and the humid air in the house hits the cold speaker, it'll condense. Exactly the same reason cooling coils in furnaces have a drain tube (but I'm not telling you anything you don't know). I guess I wasn't too clear.

Bren R.