After playing the speakers at a mid to loud volume for about an hour, the woofers shuts off. Then after about 10 minutes you can hear a pop like it resets and the woofers operate again. The speakers are bi-amped. The channels of the amp its connected to has been switched multiple times and still the same thing happens.To me it sounds like when the woofers get too hot, they power down to cool off. Then after about 10 minutes of cooling off they come back online. On older B&W matrix speakers there is an APOC (Audio Powered Overload Circuit). Has anyone else had this problem? Or I am looking for solutions.