Hi there
I've just install a new amplifier by myself, but I got some problem
When the engine off, everything seems OK, but when I turn the engine on, there are some noise from the speaker when it will vary when speeding
I removed the paint to connect "Ground wire", but nothing change
I connect the amplifier to noise suppressor --> nothing change
I adjust the "Gain" control to the min, the noise disappear, but now my subwoofer useless, can not hear from it.
So, please tell me how to fix that problem
I read some articles saying that it comes from poor ground. How to make a good ground.
Thank you very much