Car Subwoofer Amplifier Stereo Xmsjsiy Car Audio High To Low Converter Adapter Product Details This Car Audio High to Low Converter converts the high frequency output of the speaker to low frequency (RCA) output, and connects the signal output of the car amplifier or subwoofer. It is used in most cars without low frequency signal players. It is 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. 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. This converter has built-in delay switch citcuit output and low-frequency RCA output, so as to solve the problem that there is no switch citcuit and RCA output in the original vehicle when the power amplifier or subwoofer is added. The delay switch citcuit output reduces the impact on the power amplifier or subwoofer, so as to eliminate the impact and interference of electric current on power amplifier speakers and other electrical appliances when the host is turned on. It is simple to install, needs to be driven, regardless of vehicle type, and provides power amplifier automatic switch control signal, which can be directly placed in the central console without wiring everywhere, so as to avoid current acoustic interference caused by disordered wiring. 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). Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.