HOSA Adapter Cable
Crutchfield Customer Review (What's this?)
Though exactly what we needed for our system, after seeking professional help we found this cable to be wired incorrectly from the factory. I'm not saying this is all on Crutchfield and could be our receiver, but as a novice this was frustrating as I couldn't get our system working, and would have never figured out there was a problem without getting help. Super happy with the price point overall, especially since they needed to be re-wired on our end.