I just installed my old amp and sub in the back of the Audi and I am having a horrible alternator whine coming from my tweeters.
Info:
Amp MTX 421D
Sub MTX 8104
Wires are all 4 gauge
The RCA's going to the amp are from the line-inputs and are ground to the two line-input grounds. All connections are soldered.
A couple things that I have troubleshooted.
The tweeters are noisy with HU off.
The noise is not affected by volume.
The noise increases with speed.
The noise goes away when the RCA's are pulled from my amp.
The gain on the amp has no affect on the noise
I checked the amp-ground and it is connected to bare metal.
I have never experienced a ground-loop problem in all the cars I have done in the past, so I need help figuring this out.
Bookmarks