06 sonata radio install, poor sound output.
 

Ok, I finally received a replacement jvc harness, removed the factor
sterio and began the tedious process of wiring everything. I hooke
my new head unit up and the audio is barely audible and is distorted
I have to turn my radio all the way up to max just to hear anything
I used a cd to check so as not to be confused with poor reception of
the radio. I have not installed the amp or subs yet. My sonata doe
not have the factory sub or amp. I have an 06 Sonata GLS V6. An
suggestions? As of now my dash looks like someone put a sledg
hammer through it