Hey guys! I am thinking about installing a sub and amp in a 2008 Pontiac G6 that does not have the Monsoon System. This is a very basic setup. Factory head unit, two door tweeters and 6.5's, and two rear 6x9's. What I would really like to do is have the sub controlled by the "tone" settings in the factory cd player. (these are the high mid and low settings). When I turn up the low on the head unit, the bass hits harder, and when I turn the low's down, the bass doesn't hit as hard. Has anyone found a way to make this work? Also, how would the master volume on the factory head unit control the volume of the sub? Thanks!