I just installed a JVC KDG720 and now my stock speaker shut down,but the sub amp stays on, if I turn it up to about 40. It go's to 50. I have Bass blockers installed also. I had the same set up with a Sony CDX-L510X without problems.

 

Is the head unit amp driving everything but the sub? If so your head unit amp maybe shutting off but the head unit is still on so the remote turn on will still work as well as the amp running the Sub.

 

That's what I thought, but not sure.

 

what is the bass on the deck set to?

does the HU have a high pass filter

 

I think the bass is at +4 out of 8, no high pass on HU but I have bass blockers.

 

turn the bass down to 0 and see what happens

 

I turned the bass all the way down, didn't help.

 

huh... check the ground connection and make sure its secure. then check your speakers and see if any are blown