I am going to be gettinga bass tube for my car in a coupple weeks, nothing much, just 200 watts, so I can hear the added bass in my car. anyway, i know i will need to tap a signal off my existing speakers. I know i can either take the signal from the wires coming from the headunit, or I can take off my door panels and go off the signal from those speaker. which way would be easiest to do, has anyone done this already. thanks for the help.