Getting ready to throw in a replacement system in my Armada, and it has Bose. I plan on keeping the head unit, but wonder where the equalization takes place; the head unit or the amplifier? Reason why I am asking is I have a device that ties into the harness between the head unit and the amplifier and it gives 4-channel RCA low-level outputs for adding external amplifiers. If the head unit does all the equalization, the external amps are only going to amplify the signal the head unit sends out. If it's not a full range signal, then I'll need to pursue other routes. Maybe something like the JL Audio Cleansweep that is coming out in June.