Trying to set the gains on a pn4.520d.
I unhooked all the speaker wires. Turned the radio volume to 75%. Played a 1000hz test tone through Bluetooth from my phone. I touch the red lead to the + and the black lead to the - on all four speaker outputs and get nothing. I have the multimeter set like the picture below.



If I touch the power and ground wires going into the amp I get around 11.5 volts. If I plug the speaker wires back into the amp I get sound out of the speakers.

 

Are your RCA's hooked up?

 

yep, i had everything hooked up and i get sound from all the speakers. the only thing i unhooked is the speaker wires from the amp.

 

Change it to voltage AC

 

yup. 200 red

 

As posted above
Change you meter setting to the A.C. voltage
(Red numbers)

 

Thanks! I'm so far out of my scope of practice that I don't even know if that was a dumb question or not.
I got it where I want it. Finally.

 

All good Bob. make that baby sing

 

Bob2002,
Just make sure u note the target gain setting with a pencil mark and the back the bus up and set the gains by ear using the pencil mark as a reference of maxish. Ur ears don't lie!!!!
Engine running too.

T.

 

Another simple tip is to do this with the bike running. That 11.5 V for are seeing now is much less than you will see while running. Difference between 11.5V and 13+V you will have while running is extreme. Setting at 11.5 and running at 13+V is a recipe for destruction. Hope this helps
Kris