I recently purchased a Bose 700 sound bar and the Bose 700 Omni direction surround speakers. I had hoped to add a sub woofer but I’m shocked to find out it cost $700. There is a subwoofer Jack on the back of the sound bar but it doesn’t put anything out. It looks like it has to be enabled and to do that the app goes looking for a wireless Bose Subwoofer. I was hoping to add a cheaper non Bose subwoofer but it’s looking a lot like I can’t do that. Does anyone know a way around that? If not does anyone have any knowledge of a cheaper alternative to the $700 Bose subwoofer? Does the 500 sound ok it’s a lot cheaper. Thanks for any advice.