2009 Limited. Replaced head unit with ILX-650 Alpine. I have the Boston premium system. Problem is, no fade control. Recommendations for upgrade rest of system. Speakers, amps. Partial to alpine

 

Beware of the factory speaker wiring. I discovered that the wiring identified on the diagram, is not correct. You need to make sure you check speaker polarity. The OEM right rear speaker wires on mine were reversed. You can actually download a simple free app for your phone that will test polarity with a test tone.