I have a feeling there isn't much that can be done but I know there are people with this headunit on here.

So here is my issue, I am running aftermarket doors and have subs. I run the sub output back to the subs amp for the audio cables. Then for the doors I do the same with there corresponding output but when the door speakers are playing it does not produce lows just mids and highs? Does anyone know what might be the issue?

 

Your high pass filter is turned on. I would recommend keeping it on though as the speakers are not big enough to reproduce low bass notes. you may want to change to frequency that they are crossed over at though. Page 34 of your manual tells how, http://www.pioneerelectronics.com/St...Manual0123.pdf