I have had my speakers for about 5 months and have not had any problems with them until just this morning. Suddenly, my subwoofer sounds distorted and much weaker than usual. Also, when i put my hand in front of the port it seems to be sucking air in a lot more than usual. Just wondering if anyone has heard of this and if there is anything i can do. It worked fine when i went to bed last night, and today it does not. help?