Now you have me worried. I've had the same sub about 2 months and have noticed on a couple of movies a high pitched squeak from the sub during a couple of high LFE scenes. No, there are no animals inside. I could reproduce it on those scenes. I was running it at the 10 o'clock position so while it was at a high volume I don't think it was really up too loud. I hope this is not an ongoing issue as it sounds great for music but it sounded really bad when it occurred during the movies.