>>Of course, if the sub does it again, then it localizes it (somewhat) to the sub or the receiver (which is powered of... OK, in standby mode like all receivers).
In my case the problem only happened when the sub's amp had been powered up for a while... I heard it after the receiver was switched off but the sub's auto-on was still on for 15 minutes or whatever the time is.
I was able to repro more quickly by leaving the sub powered on (rather than auto-on) after checking with SVS that it was OK to do so.
Sounds like a different problem though, mine was more like what you would get if you crossed... well, maybe a canary with a subwoofer. Very low frequency chirps
