Hey, Any audio experts out there?? I stopped by my local audio installer as i wanted to add a subwoofer to my system. I have a 2020 model OEM head unit the installer checked my settings and according to him only the front speaker channel is visible, He says that he can't run the sub woofer from the front speakers as it will interfere with the tweeters? He said VW can plug in there diagnostic machine and unlock the rear speakers, does this sound correct? VW main dealer told me they don't know anything about this! as you can imagine this is very frustrating. Any help with this would be very much appreciated.