The problem is your stereo. Most Pioneer's are considered "lower end radios" only putting out 2 volts on the RCA outputs. I learned this the hard way by going through 2 models and months of research/calls to Crutchfield.

Someone told me the other day on the Facebook group about the RCA output power and that was it. I ordered a Kenwood with 4 volts RCA output and everything is good now.