So I’m running into an issue with installing an aftermarket radio (MVH-S312BT). I keep getting static sounds regardless if the radio is off or no. I’m using the Metra 70-8112. From what I’ve read online, the car has an integrated amp, so I connected the blue turn on amp wire together with the 12v accessory. If I didn’t do that, there would be no sound coming from the speakers. That way the amp will turn on with the car and not be on 24/7. And from what I’ve read online, I’m supposed to cut off the RCA ends and wire it to the new head unit. So it seems like no matter what I do, if I connect the negative end to the ground or not, I’ll end up with static. It also seems like if I'm only wired to one speaker, sounds will play on all speakers, however it will be faint.