Unable to use my gen 3 Sonos sub. Everytime I add it to my system (Sonos amp and Polk s60) it adds a crossover to my towers so they produce no low end, and the sub is turned down so low I can't hear it. Whenever I try to go to the subwoofer settings the app closes out. I have tried the app on two androids with the same result. So I had to remove the sub from the system and now it is just furniture.