Amp Speaker

Amp Speaker
A question about my speaker and amp wiring?

Tonight, I set up my rockford fosgate amplifier and my infinity speakers. I wired it all up and everything and turned them on. I put my car in the "on" position without starting it. The amp powered on and the speakers sounded amazing. Then i started the car... The speakers still sounded really good, but I could hear a slight whining noise. Then when I was driving, the faster I went, the higher pitched and louder the sound got, and vice a versa. I checked the wiring an it is all correct. Any suggestions, or does any body know why it is doing this?

I would skip the loop isolator if it is possible. It's really a last resort type of item.

Make sure that the preamp cables and the power cable aren't routed too close together. They should really be on opposite sides of the vehicle.

Another thing, making sure that the grounds are good is never a bad idea.

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