This unit is more than one year old and therefore no longer under warranty. I'll have to investigate, but I bet it would end up costing more to repair it than to buy a new system. OTOH, the nearest authorized service center is in South San Francisco, so it's possible I might be able to have something done without having to ship it back and forth. I'll have to see on Monday.
It does mean that tomorrow's coverage of the F1 race will lack the power of turning the subwoofer up to maximum.