Hello all, and thanks for your help in advance.
I've been installing a system into my Scion Xb. I put in two old 50w rms amps under the driver's seat, and grounded them both together on a hollow rectangular bar which runs side to side under the front of the seat. It seems to be connected and a part of the body.
At this point, my rear speakers are in and I hooked up the one amp to my HU. Firing it up, it sounded great. The following week I took apart the first front door and installed a component 6.5". Not yet completing the second door, I decided to hook it up so I could A/B the new component with amp versus the factory speaker running from the head unit. I hooked up the second amp. The remote wire I ran in parallel from the HU to the two amps. When I turned it on, the amps didn't work, and, checking the internet, quickly discerned that I cannot run two amps with one remote wire in parallel. I did see a suggestion to run it in series, however, and tried that. That caused the rear amp to make some disgusting clipping noises. I quickly turned them off and went back to running only the rear amp until I could run a remote wire from the fuse box.
Everything was hunky dory, and one morning I bumped my way to work. That afternoon, when turning the key to the acc position, my music came on and it was great. However, when turning it to the "on" position, a whining noise came through my amp. When I got home, I unplugged the RCA cable and the noise disappeared. I pulled out my HU and plugged an IPOD into the RCA's to ensure the RCA's were not the culprit. Pure, clean sound. It's coming from the head unit.
My head unit's ground wire is connected to the wire in the wiring harness labelled "ground."
The fact that it began quite abruptly is disturbing. So what could it be? Is my ground for the two amps not good? Did the parallel remote wires fry my HU, or did a bad ground do it? I read something about the "RCA earth track" of a head unit. Could this have been damaged? It sounds like I might be able to fix that with a soldering gun.
How can I ensure that my ground is good? Is it okay to connect both amps to the same point of ground?
I have a Spring Break road trip coming up next week and need to get this trouble shot! Thanks!//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
