Originally Posted by Guzzball
All i have is two 6.5 in the door's, is that the High Level Inputs??
Your headunit has four speaker outputs, a front left/right and a rear left/right. Tapping into this source is called a High Level Input because the voltage is higher since the internals of the Bazooka will convert this from wattage (usually around 18 watts RMS) to voltage. It doesn't matter that you only have two door speakers or even the size for that matter, as you are only tapping into the speaker outputs for a signal. This does not change the power that your door speakers will be receiving or change the impedance that the headunit sees.