Back again with monitor issue. While working in Effects, Mixer and Dynamics yesterday post session, only one (of two) monitors started making very loud popping noises. They're only plugged into DP24sd. No PC, or interface connection. Unplugging from 24 didn't stop it. Only cutting power to monitor did. This morning the sound though still their, isn't as bad. Yesterday it sounded like a machine gun. Did I kill it with my horsing around with the effects?