Ok, here's the skinny. I have a PAC LOC coming out of the stock HU. I also put a Line driver after the loc. Now it doesnt matter which gain I turn up, The LOC or the Line driver I get considerable hiss and engine whine. THIS IS IN A 05 MAX. Now the questions I have are where has anyone bought a grounding kit from for the 04/05 Max. Also where is everyones amps grounded at? I have to get rid of the noise. I have to turn the gains way down on the loc, and line driver. Which in turn kills my bass bad. HELP ME!!!

 

The Big 3:
Positive alternator to positive battery
Negative battery to ground
Engine to ground

Or try moving your LOC to another location, that could help.

 

Man this system sounds like crap. I have tried everything. This car just doesnt get good bass like I like. I am about to rip it all out and just get some good speakers and Get some decent speakers for the rear deck. I cant justify the loss of trunk space for bad sound......