Nothing set in the configuration that would affect this? Sometimes setting front speakers to large disables the subwoofer. Just a thought.
Well, I was up till 3:00 am jerking around with this thing. Setting the size of the front speakers to small, changing the crossover points, changing back and forth to large and small, restarting from scratch, nothing. I then tried the setup using the microphone, and still nothing.
I was about to give up but then decided to try again. This time however, not using manual setup as suggested in the manual for a 2.1 speaker configuration, but using automatic setup from the very beginning with the microphone.
When the test tones were now generated by auto setup, the subwoofer did respond. Now it all works. So there must be some kind of software issue going on here with manual setup, at least if using just front speakers and a sub. Who knows? At this point I was able to use the built-in EQ to make additional adjustments. (Give me manual bass, mid and treble knobs the next time please!)
IMO, there's far too much software and not enough hardware such as mechanical switches, buttons, selector knobs, etc. on new AV type receivers. I can see these devices being prone to fail at some point as there's far too much going on. But then again, I'm an old school guy and gravitate towards vintage gear or newer traditional gear without all that binary code being sent to on-board processors.
Plus, I don't believe AVR's sound as good with a traditional 2.1 speaker setup as does a good, beefy stereo receiver or integrated amp connected to the same speaker system.
Just now I configured the system differently and connected the sub to the preamp outs. The main speakers are setup as large speakers without a sub obviously. It sounds much better this way, at least to me it does. I prefer making my own adjustments to the sub and not permitting the receiver to control what it gets. Plus, the main fronts have a bigger and better sound this way.
I would imagine these new AV receivers do a nice job with movies using the full 9 speaker configuration and a sub however. But all that isn't for me. Oh well..................