utiadam
LOSER
I'm going to preface this with I owned a car audio shop for a while and still build custom audio products for people now and again and I'm a licensed commercial sound contractor... and this is going to sound like I'm being an ass... but I don't mean it that way so I'm sorry in advance
So let me get this straight here... you kept your factory HU (For what reason?) and factory amp (Again for what reason?) and then installed another amp downstream from the factory?? Assuming I followed that correctly....
You understand that by doing that you are taking a crappy source signal from the garbage factory HU, feeding it into a crappy factory amp that is amplifying that crappy signal... only to feed that now amplified crappy signal into another amp to amplify it again.... then out to your speakers.
I didn't know you used to own a car audio shop. You definitely do great work with wiring based on your build thread! I kept the factory head unit as well but it's only as a am/fm source. The JL cleansweep has an AUX input that I use for my iPad mini. If you really want clean sound then you need to use FLAC files. That starts taking up a lot of disc space though. I have some Norah Jones songs that are around 60MB per file. A normal mp3 has around 128-320kbps and those Norah Jones FLAC files are upwards of 2500kbps.