I own a 2005 Dodge Magnum before I switched headunit everything sounded good.Last Year I purchased a Clarion NX509 dvd/nav headunit. When it was installed in the magnum the speakers sound like crap, everything just sounds cheap.....why would this change I know my guy used the right harness that uses the stock amplifier? I know people are going to say get aftermarket speakers but I just want to know why this is happening.