I never new this wasn't a typical issue until I went to meet a guy that said he can help me ground the RCA's.
He had a single din pioneer premier and he said he didn't know how to adjust the EQ at all.
I messed with it a little bit, and turned the low's all the way down and the highs all the way up on the EQ, and the clarity was a LOT better.
The main thing I am worried about, is that it did not effect the bass at ALL.
It's as if there was a separate setting for the bass or something.
But in my head unit, the EQ seems to effect EVERYTHING: head unit speaker outs, sub and front RCA outs, you name it.
My deck is an avic f700BT.
I was just curious about this issue if anyone can shed some light on it.
This is exactly how I have the EQ on the head unit set right now.
I have the high pass filter on the head unit at 125.
With the CD playing, I can actually put the sub on 0 (neutral/flat)and it's pretty even. I have yet to test this at max volume though, since I just set it right now.