Axiom Home Page Forums General Discussion Home Theater More problems with my EP500

80hz is a good starting point for most speakers, however, if your sub keeps shutting off, something must be wrong...if I understand both of your problems..

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.

Just to throw this out there, since the new amp for the 500 has been released with a subsonic filter, customers seem to have had a pretty consistent issues with "low ouput". Maybe time to re-examine these amps through quality control?

I have never tried putting in a CD and checking the sub - I suspect it is not playing. Since it is rainy and cold here, I can play around with it today.

So my logic tells me that if I have the cross set at 80 in the receiver, I am not getting bass out of the 60's cuz I have them set to "Small".

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.

I have my Denon receiver on -5dB for my EP600 and like 6-7 o'clock on the amp gain knob, and still stays on all the time. To me sounds like the amps have issues.