For Use With Car Subwoofer Amplifier Stereo, Get The Xmsjsiy Car Audio High To Product Features 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). Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!