New Double Din HU with factory subwoofer

[ROBinGa]

I just installed a Kenwood DXP501BT unit and with my wiring harness from Metra was also included a Metra part AVPI-5V converter which goes between the subwoofer connector harness and the receiver harness and prevents the subwoofer popping when the unit turns on. I made a mistake of thinking all 4 of the Blue/White wires were connected together but upon closer inspection saw my mistake where a Blue/Red wire from the 12 to 5 volt converter part AVPI-5V gets connected with one of those Blue/white wires (the one from subwoofer specific harness and then the other two Blue/White are connected separately. The subwoofer popping is totally eliminated now.

 

[Tech By Trade]

You don't get that little click, around 20 hz, from the lack of a proper ground for the audio connectors to the sub on the Metra kit? The outside pin of the RCA's aren't grounded properly. I had to run a line to the common on the HU to cancel mine.

 

[ROBinGa]

I don't know about any other noises. Once I followed the complete instructions from Metra and Crutchfield install notes it seems to be wired so that there is no issues now.

 

[DjDom]

This issue also happens for some reason if you put the line input converters pre-amp on the older Explorers.

Usually just a messed up wire, bad ground or wrong connection.