Description: 【Size Information】Car Audio High to Low Converter Adapter (LxWxH) measures approx 11.5cmx5cmx2.1cm/4.53inchx1.97inchx0.83inch, with 16.5cm/6.50inch cable 【Function】This Car Audio High to Low Converter converts the output of the speaker to low frequency (RCA) output, and connects the signal output of the car amplifier or subwoofer 【Feature】Designed to solve the problem that there is no switch circuit (REM) and audio output (RCA) when the car audio is equipped with a power amplifier 【Professional Accessories】This Car Audio Converter adopts high performance amorphous alloy transformer for isolation, with high signal to noise ratio, low distortion, real sound restoration and rejection of accelerator current interference 【Easy to Use】White cable: connect the positive pole of the right horn. Black and white cable: connect the negative pole of the right horn. Grey cable: connect the positive pole of the left horn. Black and grey cable: connect the negative pole of the left horn. Black cable: connect the grounding wire. Red cable: connect 12V power supply. Blue cable: control citcuit REM output (if REM control function is not used, red, black and blue do not need to be connected) Package Includes: 1 Car Audio High to Low Converter Adapter 1 Cable Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.