Hey guys, just got a premium 2010 CTS4, I loaded the harddrive with all my songs that i could fit on there and the audio sounds great when i play those songs. Great bass, loud volume, perfect. But when I use my AUX cord and play music off my phone, the audio in the car just isnt the same. Bass is lacking, volume isnt very loud. I have my settings on full bass all the time. Any reason why it does this? Cause Id like to listen to music on my phone since its a lot easier to update that rather than loading the songs to my car whenever I wanna add any. Thank you!