I recently purchased a Polk Audio Soundbar 3000. While the product is working it sounds great, but the volume will periodically go up to max by itself. It will also go to mute by itself. It happens so frequently that the product is virtually useless. I have tried all 4 channels, turning off lap tops, moving cordless phones, nothing seems to help. I live in the country with the nearest neighbor being several thousand feet away so there is no interference from them. I think it?s possessed.