Quote:
I'm gonna guess that there is either a problem with the amp on the 500 ( note that the new 500 amps seem to need more voltage sent from the pre-out on the receiver) or the sub pre-out on the receiver has gone bad.


In my case it is not the receiver. It works perfect with my Energy sub. JC has me cranking the sub output on the receiver to +4.0 to see if this solves the problem.