I have a Bravus 8D connected to an Onkyo 607. At random times the subwoofer puts out no sound. I haven't had any problems from the rest of the system. When I go into level calibration, all speakers respond but the sub often doesn't. I have tried different cables, both brand new from monoprice. I have tried the sub in the "on" position and "auto". Sometimes it works, and sometimes it doesn't. Has anyone else had this problem. If I keep messing with it, eventually it responds but there is no rhyme or reason to it working as far as I can tell? Anyone else have this problem or a solution?
I've tried at times turning the output all the way up (+12) and still will get no sound. I'll toggle away from the screen, then back, then away, then back, and suddenly it will work. Really frustrating, but thanks for the help.
Sorry for the delay in responding to your question, things have been a bit crazy here this week. It sounds to me like the sub may not be receiving an adequate signal from the receiver, and it's a known issue that the Bravus subs do require a bit more juice to fire consistently than some other subs. Boosting up the sub channel level can definitely help, but in conjunction with that I'd suggest lowering all of your other channel levels too by 3 or 4 dB. If you lower them all by the same amount you won't throw off your calibration and what will happen is that you will be forced to turn up your master volume higher in order to get the same amount of output from them and that will send more signal to the sub as well.
Another thing you can try if you aren't already is to use a y-adapter as that will also increase the signal strength to the sub since you will be using both the left and right inputs.
This has been discussed here at the forum a bit, so if you want to take a gander at that here's the thread. Caleb's post about halfway down the page is particularly informative: