An Expensive Disposable Amp...
A not working amp should be fixable. But, the Rumble series is not repairable by most of the repair techs. I have learned this the hard way. Better to avoid the Rumble 800 series. Too expensive. Not generally repairable. And, has a greater failure rate that the 500 or 200 series. Caveat Emptor.
Verified purchase: Yes