Tony, many years ago, when I was an announcer for the nation's largest fishing expo, we had to change out the crystals on our wireless PA system because it was on the same frequency and the McDonald's that was just a few hundred feet away from the Maryland State Fairgrounds where the show took place. I came in early to set up the wireless systems for the pro bass anglers who would be providing seminars for massive audiences during the four day event. I fired up the systems, checked them out for sound quality and projection, and someone came on the sound system and clearly said "Do you want fries with that? And, we don't have anything on the menu that is a Check Check Check." I immediately called the fairgrounds management and they had a tech come out and change out all the wireless sound system crystals which solved the problem.

Hope this helps,

Gary