1, Car 4 Channel High to Low Audio Converter. 2,Used to convert high audio signal of the speaker to low frequency. 3,Made of plastic, wearable and durable. 4,Easy to install, just use after correct wiring. 5,Suitable for connecting the CD, radio, DVD, host, amplifier, of the original car. Features: Car 4 Channel High to Low Audio Converter. Used to convert high audio signal of the speaker to low frequency. Made of plastic, wearable and durable. Easy to install, just use after correct wiring. Suitable for connecting the CD, radio, DVD, host, amplifier, of the original car. Wiring: Gray wire - - - Connect the anode of the host right front channel. Gray and black wire - - - Connect the cathode of the host right front channel. White wire - - - Connect the anode of the host left front channel. White and black - - - Connect the cathode of the host left front channel. Purple wire - - - Connect the anode of the host right rear channel. Purple and black wire - - - Connect the cathode of the host right rear channel. Green wire - - - Connect the anode of the host left rear channel. Green and black wire - - - Connect the cathode of the host left rear channel. Red wire - - - Connect the anode of the power wire Black wire - - - Connect the anode of the power wire (earth wire) Brown wire - - - Connect the earth wire when there is noise, unconnect when there is no noise. Blue wire - - - 12V power amplifier control output wire (connected to the power amplifier control wire interface) Specifications: Condition: Material: Plastic Color: Black Wire: 12pcs wires Package Weight: Approx.144g/5.1oz Package List: 1 x High to Low Audio Converter Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.