If you have an MP3 player or similar you can connect the headphone out from it directly to the low level RCA inputs and check to see if you get anything out of the sub. If you now get some bass, I would be looking for a new avr considering the other speaker problems you are encountering.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70