just took my little eclipse to get an upgraded sound system...new head unit, 4 new speakers, 1000w amp, 12" sub...had it professionally installed over the course of 4 hours in the audio shop and when i tested them out down the road a bit i noticed that on CD's and auxiliary i can only hear bass, no music (very very faint anyways) but i can hear the whole song playing on the FM radio i went back tot he store but it closed and they already left. is this an easy fix should i bring it back to them tomorrow or can someone tell me what to do to fix it tonight i was really looking forward to this :/