signal sourcesDue to the wide input level adjustment range, all a/d/s/ PowerPlates™ can be driven with either aconventional preamplifier drive signal or the amplifier signal from a powered source unit. This makes thePowerPlate™ perfect for upgrading an OEM (Original Equipment Manufacturer) stereo system whileretaining the factory installed radio.Because of the high impedance of the a/d/s/ input stage, the factory radio drives an easy load. This ensureslower distortion levels than if it was driving speakers or a Line Output Converter accessory. As a result, ahigh quality factory installed radio can deliver high quality sound that is nearly as good as the sound froma high-end aftermarket source unit. The speaker outputs of the factory radio are simply connected to amini-DIN adapter as shown below. From this point on, the signal can be treated exactly as you would apreamp-level signal, except that the input level controls on the PowerPlate™ will be set to a lower thanusual level when you make your final adjustments.Conventional aftermarket sources may be connected using standard shielded RCA cables from the sourceunit’s preamp outputs to the PowerPlate™ inputs.Note: When using 4 channels of input, be sure to configure the 2ch/4 ch input switch to 4chinput. Failure to do so may result in damage to the source unit.Pin Wire Color Connects to Head Unit1 gray front right +2 violet/black rear right -3 white front left +4 gray/black front right -5 white/black front left -6 green rear left +7 green/black rear left -8 violet rear right +1460A