Metra 70-7553 Receiver Wiring Harness
2010 Subaru Outback
Crutchfield Customer Review (What's this?)
As is this harness does not supply power to the Harman/Kardon amp on a 2010 Subaru Outback. As another reviewer said, you have to splice into another wire from a second harness in the car. It will work, but it's not as simple as just plugging it in.