Here is my setup (just purchased everything new), no sound from subwoofer:
Kenwood KDC-BT365U Reciever
Kenwood KAC-5001PS 300W @ 4ohm 500W @4ohm Reciever
10" Polk Audo DB1040 4Oohm @ 270 continuous Watts, 540 Peak Watts
Amp is receiving 14V, Ground is reciting 4-5V, Remote is receiving 6-7V...