One of the tweeters is putting out a distorted signal and is likely blown. The other monitor works great. Awesome set of monitors! If you are able to track down a proper tweeter, this would be an exceptional value. These monitors where used a lot, and show tons of cosmetic wear from moving them a few times throughout college.
Due to the condition and blown tweeter, selling as-is for repair.
Please see pictures for exact condition and details.
If you have any questions please let me know. Thanks for looking!