Rustica

Thanks Paul. I had considered replacing the amp and that may be what I have to do. Rus

No takers?

Hello, I'm a bit ignorant to most of this stuff so forgive me if my questions are lame. I'm putting a new stereo HU in my 1998 ES300. I'm only replacing the HU. The amp and speakers are still the factory stuff. I read as much on the forums as I could find to help me figure out how to set things up. I think I've made it through all the hurdles (and will post later specifically how I did it) but the last item I'm still having trouble with. I have a humming/buzzing coming through the speakers when I turn on the stereo and use any of the modes (CD, iPod, radio). I've read a couple of other folks with this problem as well and some offered suggestions. Here were three helpful ideas: 1. Put in Ground Loop Isolators 2. Check your grounds 3. Run power cables opposite the RCA's Obviously item 3 is self explanatory but because I'm not very familiar with cables and their properties items 1 and 2 aren't as self-explanatory. I've included a picture of my setup. My questions are: 1) Do I have the ground loop isolator setup correctly? (I realize I need a second one for the left/right back pre-amp hookup) 2) I added some ferrite cores. Are those needed? Do they do anything in this situation? 3) Was I supposed to just tie the two ground wires together or tie them to something else? When I hook this setup up it does reduce the humming a lot but there is still a slight hum going on. Any other ideas for how to reduce the hum? Did I hook things up correctly? Thanks for any help offered. Rus