Quoted from PinPickle:
I just installed mine a couple days ago and other than EQ issues it went without a hitch.
The only thing I would do is check your connections from the pinsound to the pin. Almost seems like you haven’t moved the speaker sound from the pin to the pinsound system.
If you follow the red green(I think) speaker wires, make sure the harness they attach to are not plugged into the Simpsons pin board.
Remove the usb all together, if your still getting original sound, your not hooked up properly.
You sir are correct! My fatal flaw was I installed new speakers and then I followed the Pinsound video instructions to every detail, including connecting the CN4 harness to the old speaker bundle and not the new speaker harness. Sometimes you have to be able to think for yourself and I blew it in this case. Thank you so much for the help.