Ok so before i get flamed off of here i have done quite a bit of research and not found my answer. My problem is that i have a horrible whining noise coming from my speakers. Noise comes from both passenger side speakers and just the front driver side speaker. I have upgraded all of my grounds, as well as replaced the factory speakers with after-market speakers. Now here is my question, i have read that the factory amplifiers in our cars can cause the vehicle to make this noise. My thing is, I don't want to spend the money on ordering the only factory plug-and-play harness if there is something else that is going on. So my main thing is, is there anything else that could possibly be causing this noise? Also I have checked the alternator (OK) the battery (OK) as well as the grounding strap for the radio located on the ignition coil. SOMEBODY HELP ME BECAUSE I AM ABOUT TO GO NUTS LISTENING TO THIS NOISE. Also if it makes any difference my battery is relocated to the trunk, but has been ran with double insulated 0 gauge wire and runs the opposite side as the amplifier and RCA cables for the subwoofer.