First time user. New 990, love it except I can't get the subwoofer(s) to work. I have Def Tech 7002s in the front, an older JBL in the rear. I have been working with Steve at support for help, have done everything he has suggested and get nothing. Even tried a Digital Video Essentials disk - output on all channels beautifully except subwoofer. No LFE at all. Any suggestions would be greatly appreciated since the help desk is closed until Tuesday the 5th. Thanks.