I have a Panasonic SA-HT790V combination DVD/VCR/tuner/surround sound
with SB-WA312 "active subwoofer" unit. Recently the sound has begun to
shut off during relatively louder passages. It is necessary to either
plug in and remove headphones, or power-cycle the subwoofer unit, to
bring it back.

I suspect that the 5 channel amps are actually a part of this
"subwoofer" unit, as well. At first I wondered if overheating could be
the culprit, but now I suspect the low-frequency vibration from the
subwoofer is tripping something in the unit.

Is anyone aware of an issue such as this with Panasonic gear? Any
suggestions on where to poke and prod?

Thanks!

-Charles Green