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<blockquote data-quote="Devzx" data-source="post: 8690943" data-attributes="member: 678609">Hello, This is my first post and I know a lot of people post about noise issues but reading through them I cannot seem to find the exact source. Car is an 2018 Chevy Cruze LT without a factory amp so I’ve used a t harness in the back of the radio with 8 pairs of wires running into the trunk(speaker inputs/outputs. I connected the wires into my lc7i and rca outputs into my 4 channel and mono. Mono sub amp does not have any noise as the Low pass gets rid of it. the 4 channel is making a static noise at all times with the car on or off before I start playing music, when the car is on and I hit play on Bluetooth/usb/aux it makes abuzzing noise. It sometimes varies when it starts and stops buzzing but mostly constant. Doesn’t change with rpm, tried moving amp grounds ausing a ground loop isolator, and even used another amp with no success. Battery is in trunk and grounded directly to negative.Now when I plug my phone directly to the amp I don’t hear the buzzing, I tried connecting speaker wires to high level inputs and same buzzing.So seems as if it is coming from either the wires going back to the t harness? Could it just be that the radio puts out a lot of noise on the speaker outputs? Could it be some sort of interference that is causing this? What should be my next step?</blockquote>

[QUOTE="Devzx, post: 8690943, member: 678609"] Hello, This is my first post and I know a lot of people post about noise issues but reading through them I cannot seem to find the exact source. Car is an 2018 Chevy Cruze LT without a factory amp so I’ve used a t harness in the back of the radio with 8 pairs of wires running into the trunk(speaker inputs/outputs. I connected the wires into my lc7i and rca outputs into my 4 channel and mono. Mono sub amp does not have any noise as the Low pass gets rid of it. the 4 channel is making a static noise at all times with the car on or off before I start playing music, when the car is on and I hit play on Bluetooth/usb/aux it makes abuzzing noise. It sometimes varies when it starts and stops buzzing but mostly constant. Doesn’t change with rpm, tried moving amp grounds ausing a ground loop isolator, and even used another amp with no success. Battery is in trunk and grounded directly to negative. Now when I plug my phone directly to the amp I don’t hear the buzzing, I tried connecting speaker wires to high level inputs and same buzzing. So seems as if it is coming from either the wires going back to the t harness? Could it just be that the radio puts out a lot of noise on the speaker outputs? Could it be some sort of interference that is causing this? What should be my next step? [/QUOTE]

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