My R-112sw subwoofer has an intermittent but steady thump every few seconds even if no audio source is connected. In addition, the audio that does come through when connected is badly distorted. The subwoofer worked fine until a few days ago. I never have it at high volume levels. I do not have it connected using the wireless module. I have tried to contact Klipsch support but I haven't received a response. I opened a ticket on June 1. I purchased the sub from Fry's in July of 2017 if that helps.