Ok so i have been all over this car and here is what i have done. I just installed a New pioneer AVic-Z150BH in my 2004 S60R. i integrated the factory amp under the passengers front seat. the sound is great, way better than factory but i notice there is a whine thats not too much with the engine RPM but with the cooling fan. The faster the fan speeds up the louder the whine in my speakers gets. Should i bypass the factory amp and use the one built in the unit? Also i notice on the integration kit the power and ground wires are extremely small. Seems like they should be thicker. Possible cause? Any help would be great. other than that the radio is awesome. I have tried changing ground points to the radio and the integration harness. Just tired of removing this thing a hundred times cause it is my primary vehicle.
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