Kenwood ddx471 install problems

[btruong25]

Hi

I recently installed a new kenwood ddx471hd headunit into the car with the jbl sound system. I'm having feedback, probably ground loop issues. What would be the best way to fix this problem. Would a ground loop isolator work well? Someone told me I need 2. One in the front and one at the amp. Is that true ?

Thanks for the help

 

[nitrag]

I have the DDX470. No feedback issues.

Are you running an amp? Start by checking your ground and making sure it is a good connection.

 

[btruong25]

I just have the factory jbl amp. i put in a PAC noise isolator and it has helped a bit. but if i have no music on but turn the volume all the way up, i can hear static noise. I have no idea what is going on... any advice?