Features: Upgrading your vehicle sound system with this 4 channel high low converter, delivering precise signal conversion from speaker level inputs to low level outputs while maintaining clear sound quality for amplifiers and DSP processors. Featuring active noise canceling circuitry and a professional processing chip, this plastic converter ensures interference frees sound transmission through its 12 wire system with color coded connections for error proof installation. Ideal for audiophiles, DIY car enthusiasts, and professional installers seeking signal conversion solution for factory head units lacking dedicated outputs in vehicles ranging from standard sedans to modern EVs. Perfect for integrating aftermarket amplifiers/DSPs with stereos during sound upgrades, preserving factory features like navigation prompts while eliminating ground loop noise in multiple speaker configurations. Engineered with corrosion resistant PC material and standardized wiring interfaces, this converter simplifies complex system integrations while enduring harsh automotive environments. Specifications: Component:PC Color:Black Package Includes: 1pcs High To Low Level Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.