engine noise through speakers help

[kickadog55]

i have a 93 325is Like the title sais im getting an engine whine through the speakers. it does have an aftermarket cd player. I baught the car this way. i was told could be a ground wire on the factory amp so i ran it to a better spot and nothing.. so any help with why it would do that would be appreciated.

it did have a pioneer headunit when i baught it. it made the same noise. i put a BOSS flip screen in it it still makes the noise.

[lezbiian sweetz]

chANGE THE SPEAKER AND CHECK THE WIRES MAKE SURE THEY DIDNT FLIP THE WIRES WITH POSSITIVE AND NEGATIVE

[kickadog55]

ill take a look ive never herd of the wires being flipped causing that problem its all factory wiring and plugs besides the head unit btw.. i also check grounds on the headunit and factory amp and nothing changed.