Well I tried the Decibel 10th app for iPhone and test tones to tune my system. It worked fairly well although the meter bounced around... a lot. I don't see how anyone could do 31 bands of EQ by ear unless they were really talented.
I had no idea how off I the EQ was, its not 100% accurate, but the levels are much more balanced. The music sounds much better now. I didn't do the bass bands, I'll wait unit my microphone and software arrive for those.
What it looks like for my car