Looking for some help trouble shooting why I have louder sound coming from headunit vs the 420. I have checked all of the settings on the iphone to make sure the volume is all the way up and eq is set to flat. I have even tried a couple diifrent ipods and still the same. I have left the settings on the 420 flat as well. I am out of ideas other than there is a problem with the 420. Let me know if you guys have any ideas.
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