only one speaker wire from the front one runs with power cbls.this is bad

form your battery ..............#1st have you done the big 3 ?

look at your -neg"s- so look at the battery do you have a good - to the car like a 0g wire ?
if you can go to all your toys in the car and see if the -neg # is the same if the #is not the same you will get engine noise
how old are the rca's ?

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