I have a 2010 Nissan titan with the navigation system. I honestly want to change the head unit so I don't have to use a line out converter. I have dd 3500 on a arc audio 1200.1. I feel like its a insult to the subwoofer considering it could sound so much better. I don't really know how I would change the head unit out so how would I go about doing this? Also, would getting just an equalizer be better in this situation instead of changing the head unit? My sub can't even play lows. Also, it's the rockford fosgate stereo.